So I replaced the digitizer in my nexus one the other day, and after reassembly, everything worked...but the digitizer. No response on the screen at all. Installed the original (cracked) piece and it worked perfectly. Any ideas what might be causing it to not function? Could it just be defective? Thanks for any help in advance!
I just tore apart my girlfriends G1 and my G1 few days ago to replace her broken digitizer and both are housings. From what I gathered, make sure those ribbons are securely inserted and locked. I had a ribbon come lose a few times when placing the LCD housing back together.
If its not the ribbons, than I would say maybe you got a defective replacement digitizer?
Ground zero few days ago at work.
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Hello everyone..I recently replace the lcd for my niki htc...I bought the screen from ebay for $35 (plus shipping). Everything works fine but sometimes when i slide the phone the screen is wably or it looks like something is not connected and it moves but when i close it and i restart it again. it's fine or if i let it for awhile like that (so it goes on and off). So my question is...Is it the manufacture that made the screen, or is it something that it hasn't been connected right?
The other question is that my digitizer is broken in the up left corner and im thinking to replace it does any one can tell me how to take of the digitizer. i have found this website :http://www.pdacenter.ru/razborka/razbor_htc_touch_dual/ but it stops at the screen it doesn't tell you about the digitizer.
And the 3rd question is about that little piece it has fallen from somewhere while i dismantling my phone, i took a picture of it so someone can tell me what it is and where it goes.
Thank you very much for looking, and sorry for the noob questions first timer dismantling a phone and i loved IT!!!
You may wana have a look at the service manual, wich can be found here:
http://www.mikechannon.net/page1.html
It says that you can not disassemble it without replacing the speaker!
When you remove the speaker you need a new one. (or at least this is how I understood it
Maybe that part is the door for the MicroSD Card slot?
no i opened the cellphone 6 to 7 times so far. all you have to do is to unscrew the small screw that keeps the speaker in place so you can have more space to work with it.
all you have to do is to take off the digitiser where it gets connected. take the screen off. and raise the little black strip where the digitizer stripwires come out and push out the digitizer. it feels liked it doesn't go out but if you push it carefully it will. they have glue it with some kind of glue that it doesn't come off the digitizer but it stays on the cellphone so you can put in place your new digitizer...
If anybody needs help... pm me or leave a reply in this thread.
speaker rubber perhaps?
I just replaced my digitizer today (bought the handset from ebay - faulty touch screen). The little rubber that covers the speaker fell out in my hand when I was dismantling mine, so maybe thats what it is (looks similair).
Oh a quick question - after replacing my digitizer, my touch screen still doesnt work, even after hard reset - when asking to 'tap screen to set up device' it wont respond to any taps. Any ideas ?
fubofo said:
speaker rubber perhaps?
I just replaced my digitizer today (bought the handset from ebay - faulty touch screen). The little rubber that covers the speaker fell out in my hand when I was dismantling mine, so maybe thats what it is (looks similair).
Oh a quick question - after replacing my digitizer, my touch screen still doesnt work, even after hard reset - when asking to 'tap screen to set up device' it wont respond to any taps. Any ideas ?
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my friend i think you have a bad digitizer, some people on ebay send defective digitizer and especially when they are from china they don't really care about sending a good one.... I had to send mine back 3 times!!!! i just got the last one 3 days ago and it took me at least a month and a half to send me a working one...If you pay with paypal...Tell the ebay user to send you a good one...Do not!! Do not!! send feedback until you got a good digitizer....Mostly it has to do with the connectors i guess where the digitizer connects.... Tell them that you need a new one and you can't wait for very long...tell them this is a customers cellphone and you need to have it fixed as soon as possible.. If they don't want to exchange for a new one dispute the payment!!! Don't wait too long...Do it Asap... As i told you there lots of defective digitizers....I had reset mine also but nothing happens i believe this is mostly hardware problem...If you have any questions about how to dismantle ask me... I have open my cellphone over 10 times cause of the digitizer
Thanks Nikos, Im fine with opening these devices they are easy enough to work with.
I purchased a digitizer for a Polaris not long ago and it worked perfect. Im gonna take the Nike apart tonight again and adjust/fiddle with the connections to make sure - I dont want to wait another 2 weeks for a replacement digitizer and pay for postage lol.
But i guess if it doesnt work tonight I will have to 'grin and bear it' and send it back
Just built in a replacement digitizer. Everything works quite well, some inaccuracies in the lower parts of the touch screen, but it works.
I managed to leave over a screw. And a barely visible stain between the Digitizer and the LCD.
But at least it is working again as a replacement phone and for testing various stuff...
btw, now knowing the phone from inside, that part could be the "door" between the SIM slot and battery. or the rubber part that directs sound to the microphone on the bottom front PCB.
cheers
Yesterdag I repaired a HD2 from a client.
His HD2 was one month before repaired by HTC because the motherboard was getting to hot and begun a rebootcycle. So HTC replaced the motherboard (i think)
One week ago, my client sat on the side of his HD2 and the LCD cracked (not the glass). No warranty anymore via HTC so he came to me.
So I was going to open the HD2 and I saw many faults during earlier repair (see the attachment).
I replaced the whole LCM, (i've done this repair for like a million times) and tested the LCM and it was working fine.
But when I placed the housing back, the backlight of the screen stops working after pressing to hard on the housing. I think some connections on the motherboard ain't working right. Maybe a short circuit?
Anybody knows what this problem can be?
Again, without the housing, the LCM module is working fine, no backlight problems.
Attachment (very important!):
See the bad report about earlier HTC repairment here:
http://www.touchfix.nl/reparaties/Reparatie HD2 HT033NW05788 27-02-2011.pdf
Nobody that has this problem before?
I'd say check for any loose connections 1st. If the housing itself is causing the backlight function to stop, it could be something more internal with the LCD/digitizer.
I'd say the digitizer must be replaced as a (whole unit together -LCD and digitizer together) as it looks to be damaged based on your point that the back-light does not work or stops functioning when pressure is applied.
By the way how did you repair those brass clips that were bent? Can one find replacements?
Look forward to your reply..
Good luck
xlr8me said:
I'd say check for any loose connections 1st. If the housing itself is causing the backlight function to stop, it could be something more internal with the LCD/digitizer.
I'd say the digitizer must be replaced as a (whole unit together -LCD and digitizer together) as it looks to be damaged based on your point that the back-light does not work or stops functioning when pressure is applied.
By the way how did you repair those brass clips that were bent? Can one find replacements?
Look forward to your reply..
Good luck
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Yes I replaced the whole LCD and digitizer, its called the LCM (see my first post).
But a strange thing is, that if I press on the battery cover (with some pressure)
it will turn sometimes on..
Any ideas?
Hey guys,
I have a problem. A week ago I dropped my hd2 and the screen was smashed. I took it to the service and they replaced the digitizer. Now, as it turned out the lcd displays badly and the say it has to also be replaced. I know that after the drop the lcd worked fine. Now it looks like this: http://img857.imageshack.us/i/imag0001u.jpg
My question is - is this broken lcd? it has to be removed? or can I do something with it? is it the fault and they've done something wrong?
Thanks for answers.
Read this post by XDA member Facdemol, this post will help you answer your question.
emjakmaciej said:
Hey guys,
I have a problem. A week ago I dropped my hd2 and the screen was smashed. I took it to the service and they replaced the digitizer. Now, as it turned out the lcd displays badly and the say it has to also be replaced. I know that after the drop the lcd worked fine. Now it looks like this: http://img857.imageshack.us/i/imag0001u.jpg
My question is - is this broken lcd? it has to be removed? or can I do something with it? is it the fault and they've done something wrong?
Thanks for answers.
Click to expand...
Click to collapse
Unless they just haven't connected the LCD properly (very unlikely), there's definitely a problem with it... I'm afraid I think it'll have to be replaced.
in turkey if there is a digitizer problem they change the whole screen.
Under the TMOUS warranty they will replace your phone if an issue comes up like that because it's usually just an unlucky roll of the dice if your LCD does that.
because your problem seems to occur after a mechanical shock, i would suspect 2 scenarios.
1. You have a bad connection between the display flex connector and phone's motherboad. This can either be caused by motherboard display connector failure, some small pins on that connector got busted when the phone was either dropped or once the digitizer was changed. I give pretty small chances for this to have happened.
2. If you see a phone lcd stripped down of it's housing, you will notice that on the bottom part of it (or lateral one on some displays) you can see a flex cable coming from the display's glass-like surface to the back of it. It sits pretty tight around one edge of the screen. It connects the TFT matrix to the processing part (column&row controllers) on the back of the display (or on the flex cable/phone motherboard .. ). If a phone is hit from one side, the case and display housing can press hard on this flex cable and break it, or puncture it. In this case, some of the signals needed to drive some specific areas of the tft matrix aren't getting to the matrix itself so you see some lines on the screen (plus color rendering errors). Sometimes, improper manipulation of the screen when assembling back the phone can also cause the problem.
I give more chances to this scenario.
If number 1 could be fixed by a simple phone disassemble and connector checking, number 2 will indeed require a new display as there isn't any way to service that broken flex cable.
My previous posts about display problems tried to focus on "naturally occurring" problems, not ones induced by electric/mechanical shocks. So in this case, my above scenarios will be more suited as likely suspects for your problem.
After I replaced the crashed screen glass and digitizer on my sisters HD2 it doesn't work properly. The phone starts only if it's connected to a power source and when it starts the screen backlight is turned on but no picture appears.
I've replaced the screen glass once before on my HTC TytnII and then everything went fine but now something got wrong. Does someone know what it might be?
I've tried to disassemble it and assemble it again but it's no difference.
Get the LCD and digitizer together and then assemble with the HD2.
Looks like the 2 are not correctly stuck together and this is a cumbersome process requiring the use of an oven.
So the two must stick together to display any picture? It sounds strange to me but I've used some glue that I bought on the same place I bought the digitizer so it should be ok.
Check the LCD clip on the main board, as well as the flex cable. If both are fine, your LCD is dead and needs to be replaced. The digitizer does not need to be taped or glued onto the LCD for it to work. When reattaching the LCD, be EXTRA careful of the clip, thats the first part any of my techs damage when they first work on this phone.
Sent from my HD2 using xda premium
I have a T-Mobile HD2. A few months ago, the digitizer got a little crack but touch was working fine, so I order a new digitizer and replaced it. No matter what I did, the touch wouldn't work with the new digitizer (I know about front buttons putting pressure on digitizer ribbon cable which sometimes results in touch not working).
I thought problem might be the LCD connection slot for digitizer, so I order a new LCD too. But even with new LCD and new digitizer still touch doesn't respond! What am I doing wrong?
This problem is still baffling me. Right now, I have 2 sets of digitizers and LCDs (old ones and new ones I purchased) and no matter what combination of them I use, digitizer is not responding.
I have to say the old digitizer used to work fine before I opened up this phone, it was just it had a little chip/crack in the edge so I wanted to replace it just to make it nicer. But now digitizer won't work at all!
Is there supposed to be an insulating layer between digitizer and LCD? What wrong did I do by opening up this phone? I was very careful. The only thing I am not putting back for now is the front keys and its flex cable. Other than that, all what I took apart before, I have put back!