Database Users

[Q] [REPAIR] No backlight after repair LCD, 1ST TIME REPAIRED BY HTC

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
Click to expand...
Click to collapse
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?

[Q] [Questions]Hd2 fall....

Hello guys,
My HD2 was fallen on his screen yesterday. He seems to be in good state but it is just in aspect, the screen don't display anything except white strips and, the touch ability seems not working at all (When I press to do a slide to unlock nothing happens => no vibrations). In the right hand corner, the lcd screen seems to be a little broke.
You could see the problem at this link: http ://img25.imageshack.us/i/imgp0001by.jpg/
Do you have any ideas of causes of this? I have to change lcd screeen and capacitive screen? And it is possible to do it of my own?
Thanks for your answers and if you have any tutorials or other help, I'm grateful.

Darklink88 said:
Hello guys,
My HD2 was fallen on his screen yesterday. He seems to be in good state but it is just in aspect, the screen don't display anything except white strips and, the touch ability seems not working at all (When I press to do a slide to unlock nothing happens => no vibrations). In the right hand corner, the lcd screen seems to be a little broke.
You could see the problem at this link: http ://img25.imageshack.us/i/imgp0001by.jpg/
Do you have any ideas of causes of this? I have to change lcd screeen and capacitive screen? And it is possible to do it of my own?
Thanks for your answers and if you have any tutorials or other help, I'm grateful.
Click to expand...
Click to collapse
The cause is obviously it being dropped. Yes you have to change your screen if you don't want to have a broken one and may have to get a new digitizer. I don't know you so I don't know if you have the skill to do this yourself. If you have a warranty then carry it back so they can fix it, if not (or that's not covered under it), take it to a cell phone repair shop. They should have the equipment to fix it (digitizer, lcd, etc..) and you can pay for the service and equipment there.Hope this helps.

Thanx a lot theonew I try to see that quickly!
Do you have some reference on the web to get this components? A serious website selling this both components?

Darklink88 said:
Thanx a lot theonew I try to see that quickly!
Do you have some reference on the web to get this components? A serious website selling this both components?
Click to expand...
Click to collapse
You could go here: http://www.dinodirect.com/htc-hd2-t-mobile-touch-screen.html and here for lcd (with tools for installation is optional): http://www.smartphonebay.net/LCD-Screen-for-HTC-HD2-p/lcdp-htct8585.htm. I could not find both on one website. Anyways, I hope you can fix your phone.

Ok, to fix my phone it's 200 euros, I'd like to try to fix it on my own and now I'm at this point: http: //img835.imageshack.us/i/imgp0001c.jpg/ and this http: //img59.imageshack.us/i/imgp0002le.jpg/
(Thx to official disassembling video)
Someone have a tips to separate screen from digitizer??

Darklink88 said:
Ok, to fix my phone it's 200 euros, I'd like to try to fix it on my own and now I'm at this point: http: //img835.imageshack.us/i/imgp0001c.jpg/ and this http: //img59.imageshack.us/i/imgp0002le.jpg/
(Thx to official disassembling video)
Someone have a tips to separate screen from digitizer??
Click to expand...
Click to collapse
Well, You always can buy LCD and digitizer from eBay, taken apart or already assembled LCM (about 80-120$ for digitizer+LCD module). You have to be careful which model you buying if you decided to buy LCD and touch apart, both must be for European version of HD2. LCM assembly are compatible for any model of HD2 LEO, I've tested both T-Mobile and EU at my EU version of HD2 and they worked very good.
Separating the digitizer is not a easy job, most cases you have two broken pieces in result, but if you still want to separate them, first thing to do is to heat them to about 60*C (Celsius degree), then separate digitizer from LCD with a sharp-edge thin plastic sheet, i.e. a credit card with sharpened edge. LCD and digitizer are sticked together with a kind of black double-sided scotch tape, it is easy to see it but it is very easy to damage digitizer during this process due to very thin Indium Oxide wires on it that is easy to scratch.
The best thing is to buy fully assembled new LCM and simply replace your old LCM. In addition You nave to remove old LCM adhesive from phone housing to assure proper alignment of your new LCM. It can be removed with ethanol or isopropanol (take a cloth, wet it well with same alcohol and gently rub the grued surface until it will be clean).
Here are the Official HTC HD2 Disassembly/Assembly Training Videos but there all components are new and unused.

[Q] Replaced cracked digitizer with new, now no touch. Help?

Hey, I finally just finished replacing the broken digitizer on my T-Mobile HD2 with a new one I bought online. I turned it on after reassembling and it booted up like normal, but now there's no touch
Is there anything I can try to resolve this? Or is my phone officially dead?

Hard to give an easy answer on this.
Could be a bad digitizer or could be issue in the fitting.
You need check the connections & this should of all been done prior to building it back up.
You will have to pop the chassis out & need check mainboard to LCD ribbon first off & try reseating it to see if digi function can be regained.
Always best to to test new Digi prior to build up as a PITA if don't due to bonding it all together.
I test mine with just mainboard with a spare button board connected & lcd/digi stuck in the ribbon port all laid out flat on a desk (main ribbon not needed) & attach a battery by hand & press the end key button & hope it boots & then lcd/digi can be reviewed prior to final build up.
Favourite cause of no digi is damage to the mainboard LCD connector due to bad handling.
The digi connector to lcd also needs to be checked if no other faults or reseating of lcd/mainboard flex helps :-S
May need get another digi prior to writing other things off as some of these cheap digi units are bad due to dirt cheap manufacture & no QC plus anyone stating tested prior to shipping is talking bull so don't rule out you got a dud digi ...

Mister B said:
Hard to give an easy answer on this.
Could be a bad digitizer or could be issue in the fitting.
You need check the connections & this should of all been done prior to building it back up.
You will have to pop the chassis out & need check mainboard to LCD ribbon first off & try reseating it to see if digi function can be regained.
Always best to to test new Digi prior to build up as a PITA if don't due to bonding it all together.
I test mine with just mainboard with a spare button board connected & lcd/digi stuck in the ribbon port all laid out flat on a desk (main ribbon not needed) & attach a battery by hand & press the end key button & hope it boots & then lcd/digi can be reviewed prior to final build up.
Favourite cause of no digi is damage to the mainboard LCD connector due to bad handling.
The digi connector to lcd also needs to be checked if no other faults or reseating of lcd/mainboard flex helps :-S
May need get another digi prior to writing other things off as some of these cheap digi units are bad due to dirt cheap manufacture & no QC plus anyone stating tested prior to shipping is talking bull so don't rule out you got a dud digi ...
Click to expand...
Click to collapse
Thanks for the tips. I opened up the phone again and went through all of the connections. Everything looks fine to me, no cracks in the tapes or anything as far as I can tell. It's probably the digitizer that was sent but I'm not willing to sink another $15 on it to find out

bit of a shame ...
If you decide to break it for parts & it the TMOUS version I could be interested in the mainboard ...

Same old problem - Digitizer ?

I have HD2 , it was used from another person and this person told me that he is experiencing non responsive digitizer from time to time . I was thinking that with digitizer change everything will be OK , yes but NO . No i have changed this phone digitizer and it is not working again
My question is : Is there a way to check this new digitizer ? A lot of people said that it was related to the power button , but i doubt that , maybe is loose connection somewhere or re flow must be done on the screen connector on board ?

Need more info really, is it socket or solder ? did you have any improvement with new digitizer for a while or is it exactly the same symptoms as old one ?
Some of the cheap digitizers are rubbish in terms of QC so plenty of bad ones get sent out.
Bad connection of socket or solder to LCD can cause issues & so can bad fitting of lcd ribbon to mainboard, have seen a few which needed tweaking to get lcd to mainboard connection good so digi worked. Check mainboard connector carefully as if clamp bar broken or plastic cracked on top of connector as they break very easy in the wrong hands.
Worth checking button board too as have had one HD2 that would have digi issues & faulty button board was causing it .

how much cost digitizer?

epidemija said:
how much cost digitizer?
Click to expand...
Click to collapse
About 16USD if you hunt on eBay a bit.

New LCD and new digitizer but still no touch!

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!