I had a black g1 that had a broken power button and sticky keys, but its digitizer and touchscreen were intact. I purchased a white shell, installed everything, making sure the ribbons were fine, and now, I have a working g1 with power and good keys, but the digitizer isn't functioning.
Any way to diagnose this prior to me getting a new digitizer?
Recheck the ribbons.. they can pull out when you stick the case back together.
goldenarmZ said:
Recheck the ribbons.. they can pull out when you stick the case back together.
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Click to collapse
Looks like it won't seat firmly, and in my attempt to, the little black flip switch broke off ; would I have to get a new display or replace the ribbon port somehow? I'm bidding on some ebay bids for broken G1's so maybe I can salvage some components such as that ribbon to get the g1 back up to snuff.
New digitizer and screen later, I'm not having much luck. Same issue, screen works, digitizer nada.
Is there any other thing to check besides the connection between the display and digitizer and the display to the long ribbon extending down to the phone's motherboard?
princedwi said:
...
Is there any other thing to check besides the connection between the display and digitizer and the display to the long ribbon extending down to the phone's motherboard?
Click to expand...
Click to collapse
Indeed you may check for damaged components on your mainboard...
E.g. there's a level shifter for I2C interface with integrated ESD protection.
First check the output of your kernel with dmesg to make sure that the synaptics touchcontroller get's recognized during boot up.
If your kernel fails to register the driver for synaptics controller, there's something wrong with your hardware.
See the attachment for the location of the touch controller level shifter.
Regards,
scholbert
Related
I've just replaced the LCD display on my kaiser and it works fine as a display, but the touch function doesn't work at all. The part numbers are the same (60H00091-00M) and so is the type number (TD028TTEB3).
I don't think I have damaged anything in assembly or disassembly - using instructions from this forum. The screen was new and the old one worked before being dinkled with a key in my pocket.
Is there anything I may have missed, easy to damage or misalign etc which I can check before hunting for a new screen or phone?
Thanks,
You need a digitizer too. Most ebay shops only sell a replacement lcd screens without that part (if you got it from there). So if yours didnt say it had a digitizer on it/with it, you won't have any touch input. The part number might match a good copy from China or whatever, but might not be an original screen.
Thanks for the reply.
This screen was brand new and did have the digitiser, but I'm guessing it was second or reject stock.
The ribbon cable connection from the digitiser to the screen had been re-soldered badly and one leg was shorted to the frame. I've resoldered this and the screen is now working properly again.
Hi, i think i have problem with my screen, it's not work anymore, so I decided to reflash device with official Rom. But it didn't work.
Moreover before windows system start for the first time ir requires to tap on screen to boot. So now I cannot use my TytnII at all.
Is it any options to boot it without tapping on screen?
Or just to flash with other ROM, but HARdspl is not installed so a bit afraid to brick my phone. please help
hurdleman said:
Hi, i think i have problem with my screen, it's not work anymore, so I decided to reflash device with official Rom. But it didn't work.
Moreover before windows system start for the first time ir requires to tap on screen to boot. So now I cannot use my TytnII at all.
Is it any options to boot it without tapping on screen?
Or just to flash with other ROM, but HARdspl is not installed so a bit afraid to brick my phone. please help
Click to expand...
Click to collapse
install hardspl (same procedure as flashing) and then install rom of your choise if it dosn't work have you done any of the following
dropped it in water
gone in the washing machine
etc.... stuff like that
why don't you get a new digitizer??? it's $10 for kaiser?? i've been changing them like underwear...every half a year.
what is it, what's asking you to click on screen? if it's just a welcome screen, put welcome.not file in root.
papo said:
why don't you get a new digitizer??? it's $10 for kaiser?? i've been changing them like underwear...every half a year.
what is it, what's asking you to click on screen? if it's just a welcome screen, put welcome.not file in root.
Click to expand...
Click to collapse
hehehe funny expression 'changing them like [email protected]
what do you only change your underwear 2 a year
hehe, i live in Lithuania, so price with shipping will be around 25$. I think this isn't very cheap. Finally got screen working, but after 30min of using again no respond to tapping, then again working fine, and after that again no. it's annoying. I think it's problem with digitizer? I haven't it dropped to water, it almost brand new
hurdleman said:
hehe, i live in Lithuania, so price with shipping will be around 25$. I think this isn't very cheap. Finally got screen working, but after 30min of using again no respond to tapping, then again working fine, and after that again no. it's annoying. I think it's problem with digitizer? I haven't it dropped to water, it almost brand new
Click to expand...
Click to collapse
thats good you got it working
hope the problem doesn't happen again
if we assume the problem is harware, it would most likely by at one of two spots.
place, where the ribbon cable is soldered to lcd
or place where two piecies of digitiizer are connnected to each other.
might help if you check on the ribbon and glue a plastic tape all around the edge of digitizer, making it press little bit more on it
well, if that's hw probllem. but first you shoud try different rom. you can reflash without digitizer working. and check for pocket controller or similar if you want you can control pda from pc with it. there are two free and Pocket contr is trial.
if you just want to bypass the "tap here to use your device" message on the first boot up, search for "welcome.not".
create a blank file named "welcome.not" and place it in the root of your sd card and then power on the device for first boot up.
make sure it is a blank file. make sure it is named EXACTLY "welcome.not". if you are doing this with your windows pc, make sure you have turned off "hide file extensions of known file types". otherwise, the file might actually be named "welcome.not.txt" but might show as "welcome.not" on your pc.
search about it for more information.
hi, have tried differnt rom, but problem still persist. screen is not working, but sometimes it starts working very well. but most of the time it not respond. when backlight goes out and touch screen it starts to light but can't touch any options on. So what can be the problem, only digitezer or whole screen?
it was more probable it would be hw. but we need to eliminate all possibilities and reflash was easiest.
Still there is more things which could be the problem.
And there is no way to tell for sure what is it.
Did you say the pda is new? or digitizer?
And then you said when backlight goes off, digitizer will stop working, but still reacting on touch (to light the backlight) Is this right?
When will it stop / start working? Does it change if you press on body - case?
Does it change if you slide keyboard out or in?
There would be a short test each time pda/screen is powered, if digitizer fails in this test, it would be ignored till next test pass. Could this be your case?
digitizer could be broken on corner, or has bad contact inside
- You can test it, if you'll solder test wires on it and measure resistance, which should be around 500 ohms without touch and going down on each touch, can't go higher! test for both H & V
but the same reaction could be if ribbon cable connecting two parts of kaiser is broken (or connector on mobo side)
but if it's new it shouldn't.
and at last there could be problem on mobo. inside the controller chip or on it's connection, soldering. But not very probable.
It definitely looks like bad connection somewhere. You need to find out where, so you'll not buy digitizer if it's good or ribbon cable.
Put plastic tape around digitizer inside, as I wrote before, inspect ribbon cable and digitizer and it's connections. Try to locate event when it goes wrong.
If you'll not open it and check on these things, then maybe get a new part which will show bad, then I don't see how more we could help you.
You can use it without touch screen somehow or get a new phone.
Digitizer is US$8 with shipping to Lithuania. That's really cheap, even for us from central european countries.
http://cgi.ebay.com.au/HTC-P4450-Ka...m&pt=PDA_Accessories&hash=item5192adf317#shId
and ribbon cable have fair price too,
http://cgi.ebay.com.au/Flex-Cable-R...ewItem&pt=PDA_Accessories&hash=item3cadad06a3
papo very informative
All i want to add is that it's easier to replace the whole screen with a digitizer already on as the digitizer is very hard to remove since glued to the glass more than likely will get wrecked and not able to replace new, whereas full kit wont cost a lot more and will be less stress just 4 screws on the back plate of Tilt "where sim door is".
Well, it is not new, i've bought it from one girl, but it's like brand new, no scratching at all, very good condition.
also, yesterday i checked all the connection inside it, but the problem persisted.
I think I have understood what kind off problem it is...when remove sim card it stars to work perfectly. When insert sim, it work some time very well. Then again screen start not to respond, any ideas?
hurdleman said:
Well, it is not new, i've bought it from one girl, but it's like brand new, no scratching at all, very good condition.
also, yesterday i checked all the connection inside it, but the problem persisted.
I think I have understood what kind off problem it is...when remove sim card it stars to work perfectly. When insert sim, it work some time very well. Then again screen start not to respond, any ideas?
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Click to collapse
mm, I know some pretty good spells, but you need a magic wand to make them work. If you don't have any you need to:
tape the screen as I wrote before (half millimeter tape),
if no help, hardwire analog multimeter on digitizer and test it properly (while pda off and open) as I wrote before
tape bended paper across connector on mobo.
OR just get a new digitizer straight away. it's $8 and pretty good chance that it's the issue. it's maybe 50% chance but what I mean is:
You have $200 phone (now on market) let's assign it 200 points
It's working on 20% with digitizer broken, now you have 40 points
digitizer 8 points to add. With 50% chance to fix = 16 points to add
result: by adding 16 points you gain 160 (200 - 40) that's 10x gain = good risk
WTF with my screen? post photos. on the first my screen, on the second lcd screens which are beiing sold on ebay.
I decided to buy new digitizer, but when looked at my screen, it realized have completely different layout where digitizer is connecting to screen. Am i right? Is the digitizers which are sold on ebay will suit my screen?
that's fine. they all work. They are not oem but works well. Maybe not so scratch resistive.
You may get the digitizer solo, but they will not include a special double side tape which goes around and is holding it together. You can make that tape, but it's pain as stylez said. A lot of cleaning the used old one, then cutting small strips of ds-tape. and you need to put a paper or something in between two layers of tape as you need a little space in between. And then soldering that ribbon. Better just get whole assembly.
==
I see you tried that tape, before you buy it, try the last thing. The place where digitizer is soldered to lcd modul.
On that piece you sent photo of, you need to open back cover.
check the picture:
1. peel off antistatic tape from connector, from up -> down
2. take cover off
3. there will be attachment of digitizer behind the cover, like on your second picture.
Check for good connection
AND
check if soldered pins could not be touching the back cover you took off
( i had this problem once)
put electric tape accross it a give it a try - that will isolate it from back cover & make a little pressure if bad connection
=
Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.
bilaba70 said:
Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.
Click to expand...
Click to collapse
So you completely voided your warranty through HTC and tried to fix the device yourself, then screwed it up. I'd still say send it to HTC and ask for a repair. I don't know if they'll do it or not, unless you used official parts. I know they do out-of-warranty repairs, but they'll charge you.....
Yep you screwed up the repair, those ribbon cables need a delicate touch & any handfisted moment ends up with what you have got now ...
Another careful strip & inspection of all ribbon connectors is needed ...
I bought it as a second-hand phone. The guy didn't give me a reseat and the HD2 was flashed a WP7 ROM.
For the button problem, how are you turning your phone on without that button? do you hear/feel it click when you press it? If not its just misaligned.the buttons are on a flex ribbon cable with two holes on each side. it fits on the plastic middle frame of the phone which has two small spikes coming out of it... it has to be perfectly placed for your buttons to actually click..
if the flex ribbon is broken however you can buy one off ebay for arround 10$ any will do, mine is not original works fine..
for the screen you could have messed up the lcd, did you separate from the glass-digitizer? if you did you probably screwed it up.. its not a easy thing to do.. also was not necessary for your repairs
the connection to the motherboard might not be all the in and clipped which might cause your problem... (being that two of the little pins provide voltage and ground while all the others provide data information if one of those pins is not in all the way a piece of data might not be displaying for example a color. Never seen that happen its theoretically possible thou)
well I have only opened my phone 3 times and dont claim to be a expert.. but this is my take on it... Good luck!
@pablow Thanks for the detailed response.
The HD2 is only turned on, after I place the battery. Otherwhise it won't start.
I hear a click on the (broken) 'off' button, everytime I press it. I also noticed that the inside of not all of the 'spikes' are empty. I can see a bit of the flexcable in the spike of the broken 'off' button. The spike of the (working) 'call' button is empty.
I think that the flexcable hasn't been connected securely to the motherboard. I'll try connecting everything again tonight.
not that it makes much difference but HTC wouldn't of fixed it through warranty because of usb damage anyway
I thought so, thanks for the heads-up anyways.
[Solved] Display is fixed
Update:
I disassembled the HD2 and reconnected everything (from coax to flexcable). Fortunately it worked! The display is how it should be.
I have another problem now. All of the buttons don't work now, exept for the dial button. Do these buttons break so fast? It's annoying as fuark, because I have to disassemble it another time in the future to fix the buttons.
I also couldn't re-attach the volume control tab when assembling the HD2.
Well, I fixed my old broken G1 with new screen, touchscreen panel, case and keyboard.
Now I have 2 issue:
1) Sometimes my touchscreen goes grazy!! If I use the touch test application I see that sometimes when I touch the screen in an area there is another virtual touch in another zone of the screen. I read that it can depend from the current source when I charge the phone.. but I'm going crazy!! I opened my phone 10 times (I thought there was a problem in the cable that link TouchPanel to LCDPanel, because when I lock the cable with the clip it tends anyway to go out from the connector, now I put some scotch tape to fix but the problem is here.. so I think is another problem).
2) My volume rocker doesn't work!!
I bought 2 new keyboard to fix this problem, but no one of that fixed the problem. I thought the first new keyboard had volume keys broken, so I bought another one, but the problem persists!!
Now the Touch problem rarely happens, but the volume rocker is completely unusable..
Someone have experience about G1 assembling/repairing ?
Thanks and sorry for bad english
if you have put in multiple keypads have the same issue i would assume that it is the connection going to the motherboard. just a guess there but its either that or you have had a bunch of faulty keyboards.
only other thing would be a software problem
does the keypad work in recovery (let you go up down throughout the list) ?
as for the touch screen, probably need a new digitizer or flex cable, both are cheap and it sounds like you have the knowhow to replace them.
Ok, but digitizer is new!! screen also is new, and I have bought a total of 4 flex cable because I see that they are fragile (I broke the first I bought).
I tried to change flex cable but the problem remain the same.
The only thing that can be damaged is the LCD cable that links to the flex cable: it has a small cut where the cable have a curve, but the cut don't reaches the contacts (the cable is transparent). I also use some glue and scotch tape to mantein lock the cable.
The digitizer cable is connected to the LCD cable, and then they go to the flex cable that connect them to the motherboard.
The strange thing is that seems a software issue, because if I turn off and than turn on the screen, the problem is fixed for some seconds, minutes and sometimes hours...
Another strange thing is the possibility to control the screen with some metal objects from the moment that the virtual touch problem appear (I can control the screen also without touch it, with hand and piece of metal)
video:
have you tried a factory reset if you think it may be a software issue? if that dosent work you can try install a whole new rom.
really it sounds like it isnt the hardware since you appear to know what youre doing. i have a had a few phones that had screen (digitizer) issues and a new rom flashed cured it just fine
since you dont mind putting a few dollars into it, and your familiar with the inside, you can always try to pick up a cheap motherboard or spare phone from ebay or what have you, then swap the motherboard and you could then hopefully find out if it is the hardware or software
nagash91 said:
Another strange thing is the possibility to control the screen with some metal objects from the moment that the virtual touch problem appear (I can control the screen also without touch it, with hand and piece of metal)
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Click to collapse
Huh sounds like you got a cheap digitizer than. Most good digitizers use heat to touch. If it's literally touch, then sounds like its a fake/meh digitizer. i hate the digitizers that aren't heat, but press. I see them all the time in those first samsuck touchscreen phones. And they usually die in a bit. I had a Samsung behold with a screwed up digitizer
demkantor said:
have you tried a factory reset if you think it may be a software issue? if that dosent work you can try install a whole new rom.
Click to expand...
Click to collapse
Yes I flashed 3 or 4 roms after a wipe (I tried also super-wipe.zip), but the problem is here..
The digitizer works well some times, but sometimes get crazy (you can see in the video).
I don't that my new digitizer is fake, but I really don't know!
BTW I'm trying to repair my phone for fun (now I have desire z) and because I am fascinated by my old G1.
PS:
I see another strange issue--
If I touch the screen when the phone is on a table the screen digitizer is not very sensitive and can't take input from fingertips.
If I touch the screen when the phone is in my other hand, the screen digitizer is a lot more sensitive and it take input from fingertips.
My impression is that there is an electric field or something similar that disturbs the digitizer, and when I take the phone in my hand I discharge that field to ground. Also when I turn off the screen, seems that the electric field discharge so when I turn on the screen is ok, but after some seconds the field returns to disturbs the screen.
I really don't know, but is the impression that I have.. something that is not shielded.
Now I'll try to use my phone in airplain mode.
Thanks guys, I'm happy to see that this forum is still very active
Hello guys, Yesterday i changed the battery on my phone. After putting everything back together my screen stopped working, with no image and no touch function. The cable on the right bottom is connected but perhaps i damaged it in some way..
The phone is working properly, if I connect it to an HDMI it works.
Any ideas on what I may have done wrong and the solution?
I took it to a shoo and they say I have to replace the whole screen (USD 100 approx) which seems too much..
Check this coil. If it's shorted it's ok, if not make jumper on it. Also check filter (small bricks) under the LCD flex connector and LCD flex itself if it's not teared. Those are common damages which can be done disassembling this phone.
Yup it's the LCD flex that is dammaged.. Is it possible to repair? I'm guessing that on a shop they will want to change the whole LCD screen..
Unfortunately there is no way to change flex only. If it's damaged You have to change whole screen.
Ok, oh well that's life... thanks for the help though!