Database Develop

Replacement LCD

Hi everyone,
I replaced my LCD screen and digitizer at the weekend and am now having a few problems. The battery is draining really quickly, in about 30mins. Could this be due to a non oem screen or something? (got mine off ebay)
I am also having a few issues with the power button, there was a small amount of tape in place but im unsure if this should go below the switch or above. To prevent the circuit board switch from shorting or something?
Any help appreciated.

how much did you paid for digitizer?

well I got an LCD with digitizer attached for $43

I'm needing the same, how difficult was it to put back together,
taking it apart isnt a problem but theres that many parts I'm not sure if I could put it back together correctly

Can you tell me how many different variants of the LCD are used in the Diamond? or there is just ONE LCD w/ digitizer..? And from where can I get them for a good price?

Well to be honest, I have only had problems since I changed mine and the phone is now unusable. Its quite easy to put back together, but it seems really easy to create shorts that cause problems and I think the quality of the LCD I bought is far below that of standard and is using lots of power.
Have ordered another screen from somewhere else and will try that but think I will get a leo next week as then im due an upgrade
Would still appreciate some help with my original questions?

I bought on ebay both/LCD+touch screen/. Price is fine 36US dollars. When you buy only on of this you have problem with right connection between LCD and touch screen. Picture have little contrast but not tragically. Battery draining is same. Touch screen is more sensitive than original.

changed lcd and gps doesnt work
hello everbody..
i changed lcd my diamond and gps doesnt work. what does it mean. please help me...

naytinger said:
hello everbody..
i changed lcd my diamond and gps doesnt work. what does it mean. please help me...
Click to expand...
Click to collapse
Maybe is problem with correct connect gps antenna to connector on board.

To update this I bought a new screen with digitizer from a US company and replaced the board that connects to the microphone and now more Diamond is as good as new.
Screen is as original and excellent quality

99048907 said:
well I got an LCD with digitizer attached for $43
Click to expand...
Click to collapse
Oh that high. A friend of mine got it for $27

99048907 said:
To update this I bought a new screen with digitizer from a US company and replaced the board that connects to the microphone and now more Diamond is as good as new.
Screen is as original and excellent quality
Click to expand...
Click to collapse
Thats great, the battery drainage fixed? If all worked you should post where and for how much you bought it. So other people in need would know

99048907 said:
To update this I bought a new screen with digitizer from a US company and replaced the board that connects to the microphone and now more Diamond is as good as new.
Screen is as original and excellent quality
Click to expand...
Click to collapse
Hi,
my screen today has just started displaying loads of lines over it, i have tryed flashing but the lines stay, there is even a ghost of the Win Mobile Lock screen symbol.
Is the screen broken?
please can you post where you got your working screen from as i think i need to buy one!!
thanks
MG

MysticGenius said:
Hi,
my screen today has just started displaying loads of lines over it, i have tryed flashing but the lines stay, there is even a ghost of the Win Mobile Lock screen symbol.
Is the screen broken?
please can you post where you got your working screen from as i think i need to buy one!!
thanks
MG
Click to expand...
Click to collapse
Was your screen original from HTC or you have replaced it before??

samy.3660 said:
Was your screen original from HTC or you have replaced it before??
Click to expand...
Click to collapse
Hi,
screen is original.
what happened was, i enabled win mobile autolock, and then i kinda had a fit. It was turning the screen on and off for about 1 second each time, i thought it would stop so i waited about 40 seconds, then hit the reset button.
when the phone reset it still had an "imprint" of the windows mobile lock screen on the screen, as if it had "burnt" all the white areas onto the screen.
I tryed to screenshot it, but it didnt show in a screenshot so i presumed the screen was wrecked.
I have left my phone without battery overnight and it SEEMS to have sorted itself out, but im not sure!
Thanks in advance
MG

p.brazauskas said:
Thats great, the battery drainage fixed? If all worked you should post where and for how much you bought it. So other people in need would know
Click to expand...
Click to collapse
Thought this was fixed but the battery drainage is still huge. The phone is now constantly hot, so have stopped using it. I have dismantled the phone countless times now as I thought there may be a short circuit but with no fix.
When I posted originally the battery was on 85% after 4 hours but then the next time I turned the screen on it was on 1%.
Its annoying as I loved my Diamond but now I just feel angry when I see it on my desk. Using an old moto flip phone at the moment which I hate, untill some shops get the leo back in stock. Tempted by the n900 also, any thoughts?

Hi,
I will change my Diamond's screen. Did you buy it online? If so, would you please send a link of the LCD w/ Digitizer that you bought. Thanks in advance

IMEI, mother- and daughter board.

Hi,
I'm about to buy me a new Android phone but I have some questions about this one that I have been using - because I thought it would be fun to change and try some things with it and know what I'm doing.
[story]If you're wondering why I'm buying a new one, well the reason is because something went wrong with the motherboard. I'm pretty sure it's the motherboard because my touch screen is not responding and I know it isn't the touch screen, because the screen works fine when I change it with another G1.
So, basically I think that the problem is inside the phone. Recently I found out that I was using a "fake" charger. I never knew. So, every time I used the G1 with the charger the chin heated. This is why I think the touch doesn't work because something got heaten/broken inside were the cables connect @ the motherboard.[/story]
Anyways, my real question is about IMEI.
Does the "mother-board" (the mainboard) holds all the information such as the IMEI (that I have unlocked at the very start)? Or is the IMEI-info being hold somewhere else? Maybe the so-called daughter-board (the one in the chin)?
I read on these forums it's stored on some cable (underneath the camera)?
Thanks in advance.

Please do explain, WTF is a "fake charger"?
You really mean "fake"? Or do you mean DEFECTIVE?
G1-Amateur said:
Hi,
I'm about to buy me a new Android phone but I have some questions about this one that I have been using - because I thought it would be fun to change and try some things with it and know what I'm doing.
[story]If you're wondering why I'm buying a new one, well the reason is because something went wrong with the motherboard. I'm pretty sure it's the motherboard because my touch screen is not responding and I know it isn't the touch screen, because the screen works fine when I change it with another G1.
So, basically I think that the problem is inside the phone. Recently I found out that I was using a "fake" charger. I never knew. So, every time I used the G1 with the charger the chin heated. This is why I think the touch doesn't work because something got heaten/broken inside were the cables connect @ the motherboard.[/story]
Anyways, my real question is about IMEI.
Does the "mother-board" (the mainboard) holds all the information such as the IMEI (that I have unlocked at the very start)? Or is the IMEI-info being hold somewhere else? Maybe the so-called daughter-board (the one in the chin)?
I read on these forums it's stored on some cable (underneath the camera)?
Thanks in advance.
Click to expand...
Click to collapse

dhkr123 said:
Please do explain, WTF is a "fake charger"?
You really mean "fake"? Or do you mean DEFECTIVE?
Click to expand...
Click to collapse
Fake
~1. One that is not authentic or genuine; a sham.
I checked my charger and I noticed it isn't branded, such like Nokia, Samsung, etc... And I tried to charge another G1 with the same HTC and I noticed the chin heats up. With the genuine charger the chin does not heat up. I know I have to watch out for "fake" stuff, but I didn't check if my charger was genuine, because I trusted the seller.

I have a genuine charger for my G1 and it's chin also heats up. It's a flaw of the phone, not the charger. (or maybe a flaw of the genuine charger but idk) I do know that the chin heating up is normal.

raydar670 said:
I have a genuine charger for my G1 and it's chin also heats up. It's a flaw of the phone, not the charger. (or maybe a flaw of the genuine charger but idk) I do know that the chin heating up is normal.
Click to expand...
Click to collapse
It's remarkeable because I have this other G1 and yeah it does heat up, but this one heats up really bad. It's really hot, not just "warm". I really think it's the result of using this "fake" charger (for over 6 months) why my touch isn't responding.

[Q] Just bought nexus one - problem with screen calibration

Hello,
I have recently bought nexus one and now randomly I have problems with the screen - I click on one place and it does something totally differently. It is fixed if I turn off and on screen. Before posting the question I did do my homework - I found this
- Q5: Sometimes my screen registers touches in incorrect places, and I need to turn the phone off and on to make it work correctly again
A: This is a hardware problem, nothing can be done about it. Nexus One's digitizer sucks.
in FAQ and found out that screen can't be calibrated. Now the questions that I have are:
1) Do all of the nexus ones have this issue? Would you advice me to return the phone and get a different model or replace for the same model (I already have bought screen protectors and case).
2) How often does this happen?
3) Is this a truly a hardware issue or software issue?
If this is a hardware issue - can it be fixed by software (e.g. by restarting the driver for the digitizer every minute or something like that...). I've read somewhere on this forum (or on a different one) that motorola had similar issues and they have released a patch that has fixed the issue
4) Are their any hopes it will get fixed in future releases?
5) People who have the same phone - how often do you have to turn off and on it (the screen - not reboot)?
Any other issues I should be aware of?
About the phone - its android 2.3.4

1) Yes. Some are more affected, some are less, all have it. It also depends on a zillion of factors - including climate, average finger moisture, etc.
2) See answer 1.
3) I've never looked at the code, but Nexus One is out for a year. If it was possible to fix - I'd bet it would have been done by now.
4) See answer 3.
5) See answer 1.
You've done your homework, but still came to ask "just in case". Well, the answers didn't change for the last 1/2 year.

Thank you for the quick answer.
If all the phones have this issue - why people are still using them? Or this is something they have just got used to? Also I understand that the frequency is different for everybody, but can I please have some numbers? Its one thing if it does it once a day or once a week and totally different if it does it every hour or every 15 minutes of use... Can you please let me know how often it does it for your phone? Also are you using screen protector? Is there any corolation between screen protector and and frequency?

Screen protector is known to cause less sensitivity and less responsive screen, which might account for some of the trouble.
People got used to it.
It mostly depends on the moisture and heat - the hotter the phone, the more likely is the screen to fail. Without moisture and with casual use it'll fail once a day or so. When playing a game, it can fail more than once an hour.

stillwater2 said:
Thank you for the quick answer.
If all the phones have this issue - why people are still using them? Or this is something they have just got used to? Also I understand that the frequency is different for everybody, but can I please have some numbers? Its one thing if it does it once a day or once a week and totally different if it does it every hour or every 15 minutes of use... Can you please let me know how often it does it for your phone? Also are you using screen protector? Is there any corolation between screen protector and and frequency?
Click to expand...
Click to collapse
It happens to all nexus ones, its a hardware problem. But it only happens about once or twice a week, so most people just live with it. Just turning off then on the screen fixes it, so only takes a second to clear the error.
Also heat seems to cause it, particularly when its charging.
I go weeks without ever seeing the issue. Other times I see it once a week. It sucks but not a huge deal really.

Hi guys,
Just a quick question.... if this problem is hardware and relates to the digitizer then is it worth just replacing the digitizer?
I notice you can purchase a replacement digitizer on eBay.
Is it worth a try? And if so, is the N1 easy to take apart?
I've taken other phones apart and repaired them so have some experience.

If you replace it all you're doing is waisting your time. It will be the same thing. It is not like the digitizer is broken/failing or anything. It just sucks. Its not broken. Better way of thinking of it is a hardware limitation.

Hi guys,
Well, not wanting to be beaten by this screen problem, having suffered for over a year, I decided to take the plunge and buy a new digitizer off eBay. Cost about £20.
Found a couple of vids on Youtube which show you how to take the phone apart etc.
Two months on and all working fine. Not one single screen issue since replacing the digitizer.
Now a VERY happy Nexus One owner. Just wish Vodafone or HTC could have done the same thing on anyone of those four occasions I sent the phone for repair!!!
Now also running the MIUI custom OS... what a fantastic OS!!

Well, I'm pretty surprised no one filed class action suit against Google or HTC for supplying faulty digitizers on Nexus One
---------- Post added at 04:50 PM ---------- Previous post was at 04:12 PM ----------
jamjam11 said:
Hi guys,
Well, not wanting to be beaten by this screen problem, having suffered for over a year, I decided to take the plunge and buy a new digitizer off eBay. Cost about £20.
Found a couple of vids on Youtube which show you how to take the phone apart etc.
Two months on and all working fine. Not one single screen issue since replacing the digitizer.
Now a VERY happy Nexus One owner. Just wish Vodafone or HTC could have done the same thing on anyone of those four occasions I sent the phone for repair!!!
Now also running the MIUI custom OS... what a fantastic OS!!
Click to expand...
Click to collapse
wow! which seller did you buy it from? is it an OEM part or third party? was the multi-touch issue fixed e.g. X-Y axis all over the place when fingers come too close together? does it now register more than 2 fingers?

The seller on eBay was e_cell. Search for this item to see the digitizer I purchased: 190567591678
It was listed as: 'GENUINE HTC NEXUS ONE G5 TOUCH SCREEN DIGITIZER + TOOLS'
I used a video on YouTube to dismantle the phone and insert the new digitizer.
Search YouTube for 'Google Nexus One Screen Replacement & Take Apart Directions'
Sorry I haven't include direct links but the forum wouldn't let me.
Note: Once I'd taken the phone apart I ran a warm hairdryer over the old digitizer in order to soften the glue that holds it in the frame of the phone. Then I slowly eased the old digitizer out of the frame and inserted the new one. The original adhesive in the frame will hold the new digitizer in place.
Tip: Make sure you remove any dust or finger prints from the new digitizer before reassembling the phone. You'll kick yourself if you forget to do this as they will be visible on the inside of the digitizer and it will drive you mad! I made this mistake and had to take the phone apart again to clean it up. DOH!

jamjam11 said:
The seller on eBay was e_cell. Search for this item to see the digitizer I purchased: 190567591678
It was listed as: 'GENUINE HTC NEXUS ONE G5 TOUCH SCREEN DIGITIZER + TOOLS'
I used a video on YouTube to dismantle the phone and insert the new digitizer.
Search YouTube for 'Google Nexus One Screen Replacement & Take Apart Directions'
Sorry I haven't include direct links but the forum wouldn't let me.
Note: Once I'd taken the phone apart I ran a warm hairdryer over the old digitizer in order to soften the glue that holds it in the frame of the phone. Then I slowly eased the old digitizer out of the frame and inserted the new one. The original adhesive in the frame will hold the new digitizer in place.
Tip: Make sure you remove any dust or finger prints from the new digitizer before reassembling the phone. You'll kick yourself if you forget to do this as they will be visible on the inside of the digitizer and it will drive you mad! I made this mistake and had to take the phone apart again to clean it up. DOH!
Click to expand...
Click to collapse
I would love to know what sort of problems did the new digitizer fix?

My problem was when I touched one area of the screen another area would respond.
So a screen calibration issue.
It was most noticeable when texting. For example I'd press a key on the top row of keys and a key on the bottom row would respond.
A work around was to press the power button to put the phone into standby and press it again to continue using the phone. Sadly the problem would always come back.
I'd also have problems selecting App icons. I'd press one and another would respond.
I asked both Vodafone and HTC to swap out the screen but all they ever did was flash the rom or say they couldn't find any problem.
The issue I had is well documented on the internet.
So glad I never gave up on this.

wait so a new digitizer fixed the issue?
so theres a different version of this digitizer?
or is the model and product number still the same?

jamjam11 said:
My problem was when I touched one area of the screen another area would respond.
So a screen calibration issue.
It was most noticeable when texting. For example I'd press a key on the top row of keys and a key on the bottom row would respond.
A work around was to press the power button to put the phone into standby and press it again to continue using the phone. Sadly the problem would always come back.
I'd also have problems selecting App icons. I'd press one and another would respond.
I asked both Vodafone and HTC to swap out the screen but all they ever did was flash the rom or say they couldn't find any problem.
The issue I had is well documented on the internet.
So glad I never gave up on this.
Click to expand...
Click to collapse
sweet! I have the exactly the same issue! so yeah...i'll replace the digitizer. thanks!
---------- Post added at 04:16 AM ---------- Previous post was at 04:12 AM ----------
jamjam11 said:
My problem was when I touched one area of the screen another area would respond.
So a screen calibration issue.
It was most noticeable when texting. For example I'd press a key on the top row of keys and a key on the bottom row would respond.
A work around was to press the power button to put the phone into standby and press it again to continue using the phone. Sadly the problem would always come back.
I'd also have problems selecting App icons. I'd press one and another would respond.
I asked both Vodafone and HTC to swap out the screen but all they ever did was flash the rom or say they couldn't find any problem.
The issue I had is well documented on the internet.
So glad I never gave up on this.
Click to expand...
Click to collapse
Do you have the part number of this new digitizer you replaced? it turn out there are a number of OEM parts with different parts number

Unfortunately I can't state the part number as I don't have that information.
I simply searched eBay for a digitizer and looked for a good seller who appeared to be trusted and had a good feedback rating.
I'd bought from 'e_cell' before and knew they provided a good service.
All along I knew I was taking a gamble when buying the digitizer but the problem with the phone was so annoying I decided it was my last hope to get the thing working properly.
I've had the phone close to a year and a half, and during that time its spent most of its life either away for repair (Vodafone or HTC) or sitting in its box because I refused to use it. Instead I bought myself a second hand iPhone 3G off eBay to get by. Things were made worse by the fact I am tied into a two year contract with Vodafone.
So trying a new digitizer was my last throw of the dice, so to speak.
And the fact it worked is brilliant. I still feel this phone (Nexus One) is the best phone I've had, and I've had quite a few.
Please remember... if you decide to do what i did then see it as a gamble. There are no guarantees in life.
Oh, and be real careful when taking the phone apart and reassembling. It's not particularly hard but there is always a risk you may damage something. So be warned.

jamjam11 said:
Unfortunately I can't state the part number as I don't have that information.
I simply searched eBay for a digitizer and looked for a good seller who appeared to be trusted and had a good feedback rating.
I'd bought from 'e_cell' before and knew they provided a good service.
All along I knew I was taking a gamble when buying the digitizer but the problem with the phone was so annoying I decided it was my last hope to get the thing working properly.
I've had the phone close to a year and a half, and during that time its spent most of its life either away for repair (Vodafone or HTC) or sitting in its box because I refused to use it. Instead I bought myself a second hand iPhone 3G off eBay to get by. Things were made worse by the fact I am tied into a two year contract with Vodafone.
So trying a new digitizer was my last throw of the dice, so to speak.
And the fact it worked is brilliant. I still feel this phone (Nexus One) is the best phone I've had, and I've had quite a few.
Please remember... if you decide to do what i did then see it as a gamble. There are no guarantees in life.
Oh, and be real careful when taking the phone apart and reassembling. It's not particularly hard but there is always a risk you may damage something. So be warned.
Click to expand...
Click to collapse
Thank you for the information, so it turn out nexus one have quite a number of unresolved issues. I was wondering why didn't big G did not order product recall for people with faulty digitizer?
I looked around and found that a number of users have having all kind of issues after replacing the digitizer. Geez...what should I do? Perhaps I should take it to a professional phone repair shop?
poor reception
http://forum.xda-developers.com/showthread.php?t=961274
broken digitizer connector
http://forum.xda-developers.com/showthread.php?t=904013
replacement experience
http://forum.xda-developers.com/showthread.php?t=797203

Well, luckily for me no problems as yet (though never say never!).
The most important thing when taking the phone apart is to take your time, and memorise where everything is located. Be firm but not heavy handed. There are some delicate parts inside the phone so you have to be careful.
Common sense really.
I've had no issues with signal strength. I get HSDPA most of the time, or standard 3G. My data (internet) is working fine and so is GPS.
Inside the phone there are a couple of connectors that control signal so you have to be careful and make sure if they disconnect that you reconnect them again properly.
I build and repair computers and laptops. If you've ever taken a laptop apart that has wireless LAN capability then you'll know there are specific wires which connect the antenna to the motherboard. The same applies in the N1 but on a smaller scale.
Good luck to anyone who tries this!

does anyone from the UK have a source to get a new digitizer from that fixes the heat related issue?
ebay has one for £22.50 (id: 10goodseller2012), and i'm almost ready to click BUY, just want to see if anyone else has more info before i 'blindly' click buy...
edit: i should add, 'e_cell' seller no longer has the N1 digitizers listed...

No matter what anybody says, replacing the digitizer itself won't fix the issue. It is deeper than that. It is the digitizer mixed with the onboard hardware to interpret the digitizer inputs. Usually it ends up just being heat related. I haven't had the issue with my phone for awhile, but that is because it doesn't get as hot as it used to with older versions of CM, but if I have it in the sun, in my car dock, using GPS, it will freak out all the time.

bassmadrigal said:
No matter what anybody says, replacing the digitizer itself won't fix the issue. It is deeper than that. It is the digitizer mixed with the onboard hardware to interpret the digitizer inputs. Usually it ends up just being heat related. I haven't had the issue with my phone for awhile, but that is because it doesn't get as hot as it used to with older versions of CM, but if I have it in the sun, in my car dock, using GPS, it will freak out all the time.
Click to expand...
Click to collapse
i too was sceptical, and i still am.
however, I've replaced the digitizer and so far it's perfect! i'm not sure it's placebo as i could get it todo it 100% of the time.
prior to ordering the new digitizer, i ran tests to see at what temp ranges the screen would play up - according to the battery temp (Battery Monitor Widget), it will play up over 40c.
what i SUSPECT is the fix, is the digitizer i bought is a newer hardware revision than the one i had. the new digitizer did come with it's own chip on the flexible PCB.
i did mean to write down the new digitizer number and compare from the old one to see if they have revised it - alas, i forgot to get the new number. (old one is 940-473-1r5)
its been installed for almost 2 hours now, and on test for around an hour to build up heat - screen on full, camera on, GPS on (using aLapRecorder HD) and it's perfect. before i could guarantee a problem with screen dimmed, camera on, GPS off, so early impressions are good!
I'll give it a proper test tonight on the way home from work - it'll have the windscreen blower aswell..

Memory card, camera, sensors defective, serious problem, need help!

Hello,
so today I bought a second-hand LG optimus black that was soft-bricked and had a cracked touchscreen. Since I'm not new to android and know how to fix these things, I thought this was just another way for me to get a good phone cheap.
The problem is:
- after unbricking the phone, and installing official v10a software, there are issues with the phone - camera force closes, any of sd cards wont be recognized ("removed sd card, insert a new one" notification, never changes), the screen rotation doesn't work, there is no lockscreen, phone dialer has lags, and the screen turns on after 5-10 seconds. Otherwise it's ok.
With software v20b it also likes to hang up. Theeen you have to remove the battery
So I dissasembled it, and it seems to have short circuited somewhere on the motherboard (there is a brown spot on the metal motherboard cover plate).
I marked the area in a picture below (notice that it's right next to the SanDisk chip - i guess that organizes the memory, so it should take care of the sd card as well). Keep notice this isn't the picture of my motherboard, I will post my own photos a bit later..
Maybe it was waterdamaged, but the sticker on the battery is white :/
Please don't tell me to factory reset, or try other software or memory cards, already did that.
CWM won't detect memory cards as well.
I need any possible ideas to fix it.. do you think a reflow would have any chances to do the job? any ideas, please, will try anything..
PLEASE, help.

Some update. So I flashed software V30B, and it seems to get better - finally I get a lockscreen, and not in 10 seconds also, the accelerometer sensor is working, phone is smoother. FRONT camera is working as well, while in video call mode, yay! when turning on the camera, it has a black screen with all the buttons and camera settings, and a message that there's no sd card (although it's inserted :| ) and hangs up if I switch to front camera. Memory card still not detected..
Thinking of capturing a video to show you whats the situation.. Till then here are some photos to show you my beauty
P.S. don't be shy, guys, any ideas for fixing?..

the photos

Anyone?
I thought I would get some replies, at least maybe I was wrong

Eimantazzz said:
Anyone?
I thought I would get some replies, at least maybe I was wrong
Click to expand...
Click to collapse
i am sorry, but ppl in here(p970) isnt as good as ppl on s2 or s3 thread.......
maybe on s2 there is chainfire, that undrrstand phone by hardware and software....but here....even development is on "almost dead" stage.....no stable cm, even cm7.....so sad.....
so....dont expect professional answer soon.......
and btw..try your luck on android hardware hacing thread....maybe there is some answer for you there

123r4ka456 said:
i am sorry, but ppl in here(p970) isnt as good as ppl on s2 or s3 thread.......
maybe on s2 there is chainfire, that undrrstand phone by hardware and software....but here....even development is on "almost dead" stage.....no stable cm, even cm7.....so sad.....
so....dont expect professional answer soon.......
and btw..try your luck on android hardware hacing thread....maybe there is some answer for you there
Click to expand...
Click to collapse
Thanks for the reply!
Well I thought I would find more hardware technicians here, but whatever..
I downloaded the service guide for optimus black, and after looking at the schematic sheets, I'm 90% sure it's "SUB PMIC CAM POWER (LP8720)" controler that's failing. It controls the 5mp camera, microSD card and motor driver (vibration) power supplying. Neither of these functions are working on my OB. So no need for hardware hackers, nothing new they can tell me. So I'm thinking of ordering this pmu, but could you tell me guys where I could get it from with normal priced shipping? Shipping time wont matter at all.. Digi-key and mouser want to charge me with 40$ shipping, while all I need is a 2$ part

Eimantazzz said:
Thanks for the reply!
Well I thought I would find more hardware technicians here, but whatever..
I downloaded the service guide for optimus black, and after looking at the schematic sheets, I'm 90% sure it's "SUB PMIC CAM POWER (LP8720)" controler that's failing. It controls the 5mp camera, microSD card and motor driver (vibration) power supplying. Neither of these functions are working on my OB. So no need for hardware hackers, nothing new they can tell me. So I'm thinking of ordering this pmu, but could you tell me guys where I could get it from with normal priced shipping? Shipping time wont matter at all.. Digi-key and mouser want to charge me with 40$ shipping, while all I need is a 2$ part
Click to expand...
Click to collapse
well mate, i have no idea..... i am just normal customer, if something wrong with my phone, and i cant fix it, i always go to official service center......
but, i hope you got some luck out there, happy shopping

Makes sense. Most people don't believe that ICs are a very sensitive component.
Obviously, I can't make a theory of what's wrong on that device, as I don't have it here.
Do you have a multimeter? On the service manual you might have somewhere what to do (e.g. where to measure voltages) if some functions are not working, or did you already try that? I know the service manual always ends with "replace pcb", as usually the technical support don't actually do the repairs, they just follow what's on the manual and send the old parts to the manufacter for repairing and reassembling, but it might help you understand if you really need to replace this IC. Is there any fuse nearby, for example? Remember, a short circuit would break fuses. You can check with a multimeter whether they're damaged or not (continuity test).
There's not much I can say, really...these are just some suppositions...
Good luck with that, man
Sent from my LG-P970 using Tapatalk 2

von Mandrake said:
Makes sense. Most people don't believe that ICs are a very sensitive component.
Obviously, I can't make a theory of what's wrong on that device, as I don't have it here.
Do you have a multimeter? On the service manual you might have somewhere what to do (e.g. where to measure voltages) if some functions are not working, or did you already try that? I know the service manual always ends with "replace pcb", as usually the technical support don't actually do the repairs, they just follow what's on the manual and send the old parts to the manufacter for repairing and reassembling, but it might help you understand if you really need to replace this IC. Is there any fuse nearby, for example? Remember, a short circuit would break fuses. You can check with a multimeter whether they're damaged or not (continuity test).
There's not much I can say, really...these are just some suppositions...
Good luck with that, man
Sent from my LG-P970 using Tapatalk 2
Click to expand...
Click to collapse
I do have a multimeter, I'm kinda into electronics so..
Yeah, so I had a little break and checked the phone out only a few minutes ago.
The LP8720 is the problem, but its much more f..ked up than I thought..
I marked three spots on the circuit that are quite odd:
1. The place where IC U601 - LP8720 should be.
2. 2.2uH wire wound resistor L601 (MIPSZ2012D2R2 MIPSZ2012D2R2, 2.2 uH, N,2.0X1.2X1.0), not sure if it works, maybe it burnt out, my multimeter shows 0ohm on this one.
3. The place where capacitor C604 (10uF) should be.
I attached the pic of my motherboard, you'll see whats up..
The only place I can get LP8720 is alibaba.com, and the minimum quantity is 10.. that makes about 16 bucks for these. Would be worth buying and trying to fix? And another thing, it's named LP8720TLX-B, not LP8720TLX. Do you think it'll do?
I'm now thinking of taking it to a service center, ask if they could do such a job and how much would it cost..
Thanks for the replies, by the way!
Peace

Eimantazzz said:
I do have a multimeter, I'm kinda into electronics so..
Yeah, so I had a little break and checked the phone out only a few minutes ago.
The LP8720 is the problem, but its much more f..ked up than I thought..
I marked three spots on the circuit that are quite odd:
1. The place where IC U601 - LP8720 should be.
2. 2.2uH wire wound resistor L601 (MIPSZ2012D2R2 MIPSZ2012D2R2, 2.2 uH, N,2.0X1.2X1.0), not sure if it works, maybe it burnt out, my multimeter shows 0ohm on this one.
3. The place where capacitor C604 (10uF) should be.
I attached the pic of my motherboard, you'll see whats up..
The only place I can get LP8720 is alibaba.com, and the minimum quantity is 10.. that makes about 16 bucks for these. Would be worth buying and trying to fix? And another thing, it's named LP8720TLX-B, not LP8720TLX. Do you think it'll do?
I'm now thinking of taking it to a service center, ask if they could do such a job and how much would it cost..
Thanks for the replies, by the way!
Peace
Click to expand...
Click to collapse
Hey man,
keep an open mind
What makes you so sure that this IC is damaged?
Think: if the nearby components are damaged, then this IC may behave differently (or may not work at all). We don't need math to think this.
But yes, it can be damaged, but since this is the most expensive component, I think it is really worth checking the others first.
Anyway, answering your topics:
1. Everything looks fine. Good ^^
2. Yes, it's probably damaged. An inductor is supposed to have resistance, but not much. For this one, 0.23 ± 30% Ohm.
Source (datasheet): http://www.fdk.co.jp/cyber-e/pdf/CD-TCE070.pdf
3. Fortunately, this is an easy one. If in doubt, just replace it.
Now, for the headache...LP8720TLX-B and LP8720TLX might be the same IC, but the only way to know this is by comparing their datasheets.
16 bucks is a lot to pay for a component (yeah, it's 10 of them, but it's still a lot). But this is actually your call...are you willing to pay 16 usd for an IC? If it was me, and I was entirely sure it would fix everything, I would probably buy them, but then...like I said, your call.
I think it's worth taking it to a service center, but if they truly follow the service manual, they will tell you they need to replace the entire pcb. But I really think it's worth to try, you never know.
Good luck

[Q] Touchscreen lag

Hi everyone !
I recently got my digitizer changed (apparently phones don't like faceplants ) and when i got it back I noticed a "slight" change.
Symptom :
When I touch the screen and slide my finger there's a little lag before the move is recorded by the phone, like, I have to move my finger more than 1/2 inch away from the starting point or it consider my finger didn't move from it. (thus resulting in little jumps when sliding through menus or if you wanna draw a circle it start by drawing a straight line :silly After the phone catches up however (so, as long as I keep my finger on it) it follow up well just like it has to :good:.
Resolution tested :
Through research I think my problem could come from a change between the dpi of the stock digitizer and the one I got in replacement, so the stock touch_slop value isn't adapted anymore. I tried to change it in my build.prop, but it made no difference and the problem is still here. Although it doesn't mean the problem doesn't come from that (The way Android handles touch_slop has changed in the latest versions) I don't know how to fix it and I need advices. Has someone already encountered that problem ? How can I fix it ?

up

Firstly, Did you ask SONY to change the digitzer or from an external vendor?
Secondly, was the digitizer flex cable given to you when you purchased the new one?
Thridly, Is the digitizer properly placed on your screen?

Furrydaus said:
Firstly, Did you ask SONY to change the digitzer or from an external vendor?
Click to expand...
Click to collapse
External vendor, I firstly went to the official support and they said It would cost me the price of the phone, , so I didn't insist on the "official" way
Furrydaus said:
Secondly, was the digitizer flex cable given to you when you purchased the new one?
Click to expand...
Click to collapse
I'm not the one who changed the digitizer, I went to a local tech shop, the only thing I was given was my phone.
Furrydaus said:
Thirdly, Is the digitizer properly placed on your screen?
Click to expand...
Click to collapse
Yep, from an external point of view you can't say it has been changed (If you don't mind the big cracks that were there before )

classicalpunk said:
External vendor, I firstly went to the official support and they said It would cost me the price of the phone, , so I didn't insist on the "official" way
I'm not the one who changed the digitizer, I went to a local tech shop, the only thing I was given was my phone.
Yep, from an external point of view you can't say it has been changed (If you don't mind the big cracks that were there before )
Click to expand...
Click to collapse
Ok so the tech shop might be the problem. They might have used an incorrect cable and might have also provide you with a bad digitizer. The Cable is essential as it transfers touch signals to the board and if its faulty or not of good quality the digitizer might as well be useless. For the digitzer you might want to check with them on what digitzer they used and if its those cheap 'china' brand types then it's also not good for your phone. Quickly get to the shop and ask them to help you because a faulty digitzer might break your whole device :crying:

Yeah it might be, but as I said, it's only the first "move" that lags, it record the touch at the exact moment I touch the screen and after the first 1/2 inch is past there's no problem anymore so I don't really think the problem is related to that.
Actually, I think there was a similar "problem" a few years back, it was related to the way Android make a difference between a click and a swype. Its create a deadzone around the first point that's touched by your finger, so that every time you click it's not considered as a swype (because biologically you just can't click only ONE pixel). The size of this deadzone was the same on every phone and was related to the touch_slop value. At some point on some "newer" phone the size of the digitizer was bigger but not the dpi and so the deadzone began to be a hindrance more than a conveniance, cause its size grew with the size of the screen. I was then decided to change the way it was handled by the system and a new method has been implemented, using mtouchslope value, that's not just a number of pixel but that's calculated from the dpi value of the digitizer. SO I think that the digitizer I got isn't the same as the stock one (just like you said) but I think there's a way for me to fix the problem in a more "software-way". The only thing I don't know here, is how can I change the digitizer's dpi value that's stored inside the phone.

classicalpunk said:
Yeah it might be, but as I said, it's only the first "move" that lags, it record the touch at the exact moment I touch the screen and after the first 1/2 inch is past there's no problem anymore so I don't really think the problem is related to that.
Actually, I think there was a similar "problem" a few years back, it was related to the way Android make a difference between a click and a swype. Its create a deadzone around the first point that's touched by your finger, so that every time you click it's not considered as a swype (because biologically you just can't click only ONE pixel). The size of this deadzone was the same on every phone and was related to the touch_slop value. At some point on some "newer" phone the size of the digitizer was bigger but not the dpi and so the deadzone began to be a hindrance more than a conveniance, cause its size grew with the size of the screen. I was then decided to change the way it was handled by the system and a new method has been implemented, using mtouchslope value, that's not just a number of pixel but that's calculated from the dpi value of the digitizer. SO I think that the digitizer I got isn't the same as the stock one (just like you said) but I think there's a way for me to fix the problem in a more "software-way". The only thing I don't know here, is how can I change the digitizer's dpi value that's stored inside the phone.
Click to expand...
Click to collapse
Dude you should have used the reply funtion so I could reply more quickly
Anyways there is Resolution Changer by NoMone in the Play Store that deals with the resolution changes and DPI too. >>>
Regards,
Furrydaus

Furrydaus said:
Dude you should have used the reply funtion so I could reply more quickly
Anyways there is Resolution Changer by NoMone in the Play Store that deals with the resolution changes and DPI too. >>>
Regards,
Furrydaus
Click to expand...
Click to collapse
Yeah, I already looked for that, and the dpi value that's changed by this app is also present in the build.prop file but it only changes the dpi of the lcd screen and not the digitizer's one, so it doesn't really help me in this case. But thanks for your concern anyway

classicalpunk said:
Yeah, I already looked for that, and the dpi value that's changed by this app is also present in the build.prop file but it only changes the dpi of the lcd screen and not the digitizer's one, so it doesn't really help me in this case. But thanks for your concern anyway
Click to expand...
Click to collapse
Well thats a shame... How about you seek more help from your local tech shop? I'm sure they'll be more than happy to tell more!
No problem mate! I hope I've helped you in any ways possible! Hope you have a great day ahead!
Regards,
Furrydaus