So, middle of of screen is dead, it just died one day, so now I'm looking at a digitizer on eBay, but I just realized I don't want to f**k up my phone trying to fix it.
Any one able to help in any way?
(If you're in Florida, able to physically help? There's a Google Wave invite in it for you.)
jiktheworm said:
So, middle of of screen is dead, it just died one day, so now I'm looking at a digitizer on eBay, but I just realized I don't want to f**k up my phone trying to fix it.
Any one able to help in any way?
(If you're in Florida, able to physically help? There's a Google Wave invite in it for you.)
Click to expand...
Click to collapse
Dead as in no touch function or dead as in nothing appears? Unless you are VERY skilled (and I take it, you are not), you will not be able to replace a digitizer and not many places will offer a service that you require. Not only the digitizer needs to be adhered to the LCD properly, the flex needs to be soldered. My advice is to purchase the entire LCD/digitizer assembly, I know it's more expensive, trust me, those digitizers on eBay are not cheap for nothing, no matter how tempting it may seem, it will save yourself a lot of headache and trouble if you'll just replace the whole thing.
Service manual
Hi, if you need the service manual to disassemble i have a copy in PDF format i could send you? let me know.
Bit of a mess here and coulddo with some help please.
I changed the screen of my UK i9000. After putting everything back together, i noticed i had no signal, only a Blue Circle with a cross through it... Antenna problem i quessed... Somehow i managed to snap of the pigtail connector from the motherboard..
Stupid i know, and trust me am kicking myself. Does anyone have any idea as to where i go from here? Any help would be greatly appreciated..
Pics are included.
well if you have a gentle steady hand perhaps you could solder it back on..
if your not brave enough i'd take it to a repair shop.. seems like an easy fix to a professional.
Thanks, But the smc connection is lost, do you/anyone know the part number for it? and also the white lead.
I will try to solder the connection again, but i think i have ripped up the solder from the board and might need to cut into the traces, which i really dont want to have to do...
Iamodo (I think that's how it's spelt) has a repair shop in blackpool, he seems pretty clued up - I'd try there first. He's posted regarding white sgs recently if you want to do a search and send him a pm. He's always very helpful.
Sent from my GT-I9000 using XDA App
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
I have a Razer Phone 2 with the infamous non-working USB C port. There seems to be very little supply for the board itself unless it's a used part and those seem to be farelt expensive. Looking at a teardown video of the phone it looks as though the port itself is attached to a flimsy ribbon type cable attachment. If anyone has any experience with this specific part could you please tell me if there are solder points that could be either reconnected or replaced with a completely new port without replacing the whole board? A friend of mine has a a fair bit of know how when it comes to doing repairs of this sort, but I'd hate to take it apart to try and replace the port it self and risk damaging the seal of the device for no reason at all if this procedure is not even possible without a replacement of the full part. Thank you in advance for any replies. I know this question might be a long shot, but we are just trying to weigh our options and figured someone on here might have the experience to point us in the right direction.
murderfacexx87 said:
I have a Razer Phone 2 with the infamous non-working USB C port. There seems to be very little supply for the board itself unless it's a used part and those seem to be farelt expensive. Looking at a teardown video of the phone it looks as though the port itself is attached to a flimsy ribbon type cable attachment. If anyone has any experience with this specific part could you please tell me if there are solder points that could be either reconnected or replaced with a completely new port without replacing the whole board? A friend of mine has a a fair bit of know how when it comes to doing repairs of this sort, but I'd hate to take it apart to try and replace the port it self and risk damaging the seal of the device for no reason at all if this procedure is not even possible without a replacement of the full part. Thank you in advance for any replies. I know this question might be a long shot, but we are just trying to weigh our options and figured someone on here might have the experience to point us in the right direction.
Click to expand...
Click to collapse
I have the same problem. And since sending it back to Razer( don't get me started on how much there customer support sucks!) would cost more than buying a used phone 2. I am thinking to replace the port. Did you have any luck?
I work in a repair shop where I get these from time to time. You can try a used charge port board, but that doesn't always fix it and that seems to be a temporary fix. I have yet to find the root cause of the charging bootloop on the nearly dozen rp2's I have
Can I post hardware questions here?
scm37390 said:
Can I post hardware questions here?
Click to expand...
Click to collapse
Sure, why not? If it's to do with the S21U this is probably the best place.
You might edit the title in your first post to something more captivating like, "How do I interface a ceramic kiln to my S21U over I²C?"
Not sure I understand the reference to a "more captivating title", but as far as the phone here goes.
Got an s21 ultra, tmobile. Phone can't see any sim. I've TRIED all the OS related resets etc. Nothing works. Can't find a schematic other than the usual spammy looking ones in a google search. Nothing from Samsung.
I have the board out. It did have a hot spot on it while it was on. Removing a very small metal shield reveals an IC that has obvious high heat discoloration. Can't find any info in component. I see plenty of this model phone with the same problem for sale on auction sites.
Can I buy schematics/board level components for this phone?
No, you're not going to find any schematics.
If you have a good high res photo maybe somebody can tell you what the major parts.
I'd guess that the chance of getting everything working 100% is small.
You might be able to use it as an alarm clock or MP3 player or weather station.
I don't know e-sim!
Photo of short IC
More..
A9146
NDO32
KMO34
Sorry, I really can't see anything from those photos. That appears to be the processor.
If it got really hot any of the BGA connections underneath it could have gotten wrecked/shorted.
I don't even know what the interface to a SIM is, but it could have been lost.
eSIMs are like SIMs except that they are soldered in. If you have one, you have one. If you don't, you don't.
Really hard to believe no one has any hardware info. Maybe I am in the wrong forum.
Any ideas?
Other forums?