I wanted to change the touch screen on my QTEK 2020 and I bought a new one a few days ago. I opened tha PDA, but when I tried to pull the touch screen off, I damaged a slim orange cable on the back of the screen. Specifically, I pulled a black sticker and it took along the two cables that were on the circuit on the screen. I don't care for the touch screen's cable, but for the one of the screen. I have scratched the insulation on the cable and I have a question. If I just put over the circuit the nakes cable and glue it a little belower, would it make connection? Or have I to solder it? And How am I going to soldier a cable like this that's naked from the side that I don't see when I put it in place, without even melting and damaging for good the screen or the cable itself? I have some pics, too for you to see and understand what's going on. Please help me, as I am a young man with prospect and I want to learn things like this and do stuff more than the usual.
OK, I couldn't wait for advice so I soldered both cables. The screen turns on and it needs to be aligned. I tap the screen, the touch screen works, but when I finish the alignment, it starts from the beginning, the cross in the center. It asks to be aligned constantly. I haven't assembled the PDA, I have it like the pictre below. Is this the problem it doesn't start, or do I have to put the touch screen somehow differently? I have it centered and tried to align tapping a little upper, lower, left, and right from the cross, but nothing.
Please HELP!!!
OK, no worries! I fixed it! It took me all evening, but I'm completely satisfied. Solder this, solder that, make a bridge because a connection was damaged with all the scratching, but it worked!
cong. dominator happy that you have finally fixed it :wink:
Thanks Kbantikos my boy! And here's the bench and the heat tool I used! That's the only that I have. No doubt it took me 4 and a half hours to complete.
Congratulations! I'm not kidding, saw a lot of "homework" results, in some cases, display was damaged beyond repair.
You get the working display, so you are lucky .
Thank you, my friend! I didn't believe my eyes when it booted! It still works fine, even if it fell off my hands one time!
my touch screen is really quite dull / lacks brightness even when on the high setting
i've aquired an XDAII that isn't working but i know its screen was bright when it was working
my question is: what do i need to be looking out for / be carefull of when i replace the screen
what would you do differently?
thanks
Larry
You'll definitely have to look for that orange cable that's not of the touch screen. on the back side of the screen there should be a black sticker. When you try to pull it over, it takes the cables, too. So pull it from the side of the touch screen's cable only. You are gonna need to solder the new touch screen for sure, just placing it won't work. Scratch the side of the cable that's going to be placed on the circuit on the back of the screen so that the metal contact on both (touch screen's cable, circuit) is naked. Put solder on the circuit's contacts. Then put the cable on top of the circuit, but a little lower. Now, burn the solder holding the cable steady and connect that way all four contacts. I hope I was of a little help, observe my pictures and good luck!
Just about to try this myself.
Touch screen bought from - http://stores.ebay.de/hitechhk. Arrived within 1 week.
Removing the black tape on the back of the screen, even very carefully, pulled off both the connections for the touch screen and another connector (the back light I think)
In hindsight would recommend only removing the tape around the touch screen connector.
As soon as I find a small enough tip, will resolder everything.
Detominator7, how did you change your digitizer? cause i need to replace mine too, but the seller is talking about soldering it. i already open my pda and all i can see is there is only plastic cable. how do you solder on plastic?
Your touch screen might have a cable that plugs into a hole and does not require soldering. You know, like the fans we use on PC.
Dominator7 said:
Your touch screen might have a cable that plugs into a hole and does not require soldering. You know, like the fans we use on PC.
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Click to collapse
no, i already checked (disassambly my pda) i got the ribbon cable that attached to another ribbon cable at the back of lcd.
hi dominator touch screen 2020i
please dominator, could you send me or post a clear procedure about touch screen sostitution?
have I to cut some cable...?
sorry but i'm italian and i don't understand so well english!!
thanks a lot!!!
Dominator7 said:
Thanks Kbantikos my boy! And here's the bench and the heat tool I used! That's the only that I have. No doubt it took me 4 and a half hours to complete.
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Click to collapse
good job! I have the same problem and so i got a new touch screen but i cannot get over the calibration thing same as your problem before can you give me some tips as to what to do im just about to give up and get a new lcd.Only thing stopping me is the price of a new lcd.
What kinda adhesive do they use on the back of the screen
I'm talking about the clear glue type adhesive on the back of the screen in order to hold the ribbon in place
here's a pic of what I'm talking abouthttp://blog-imgs-3.fc2.com/i/n/u/inuchanbt/CHT9000_dismantle12.jpg
The gold/copper ribbon glued to the screen
had to replace my brothers screen about 3 times and now its barely stickin
it's a kinda like double tape. u can find in office stores
I hard reseted my O2 XDA II & I had surprised the screen aligning can't be passed.
Can somebody help me with ROM Flash or maybe some hardware tricky?
I use WM5 from C_Shekar.
PM me if anyone replies this message.
Thanks, Berns.
well after 8weeks of my blackstone its decided to break, everything works normally but there is no response from the digitizer. the only thing i can see wrong is theres a patch where the digitizer and screen are making contact all the time (the screen is perfectly intact and no pressure has been applied at all) its a perfect square and about 3/4inch smaller than the screen. im not sending it back to htc, im going to repair it myself as i can have it sorted faster and im not that fussed about the warranty.
any ideas to the cause?
thanks
karl
Any water / liquid /sweat seepage?
You can look into this thread for service manual and some user experiences.
theres no liquid in there, its as if the digitizer is stuck to the screen
managed to repair it, what a pain it was, turns out that the top and next layer of the digitizer were stuck together, the hard part of the repair was seperating the digitizer and screen but after 15mins of fiddling and nasty names i did it and it looks immaculate, this being said i never want to have to do it again
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.
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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.
Hi,
I had a small accident today with my HD2 . It felt from my pocket to the hard floor. It was in the leater pouch, but it hit right on the corner, where is no coverage.
I picked the phone up and was happy at first (no display cracks), but not for long. When I tried to turn it of, grey screed showed.
The device seems to be working, I can turn it on/off with the HW button...but I cant see anything.
As I said, there are no cracks of the glass layer so the digitizer should be ok. I just don't know actually.
Can anybody help me?
matej.charvat said:
there are no cracks of the glass layer so the digitizer should be ok
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Click to collapse
unfortunately you cant make that assumption, i have a hd2 with a badly shattered glass, (same as you, dropped from about 3 feet landed on the corner, shattered all the way to the other end of the phone) yet the digitizer and LCD worked perfectly for at least 18 months before finally the digitizer died, LCD still works fine.
My point being that just cos one part of the three (glass, digitizer, LCD) seems ok tells you nothing about the other two parts.
My guess is either the screen itself died, the connection on the mainboard broke/became unseated, or even that its unrelated to the screen at all and is in fact something else that broke and shows itself as a non responsive screen.
Im not sure if this is possible given that you have no screen to work with, and i guess something would need to be installed on the phone to make it work, but how about some software that shows your screen on the PC? you may even be able to tell if touching it is working.
Hello all, I want to first thank you guys for your support since I've joined up! I recently attempted a glass replacement on a note 3. The digitizer and lcd were ok before I removed the glass. During the removal, everything went smoothly, no cracked lcd or digitizer. It was my first attempt, so I did scratch it here an there, but they weren't too deep. They were negligible enough that they would be made invisible by the new uv-glue. So, before I fully removed all of the old glue, I turned the phone on to see if the lcd still worked and it did, however, I noticed that the touch screen was mostly unresponsive. It only worked at the top where the notifications menu is. I was able to pull it down about a quarter inch and then it would go back up as if my finger left the screen. I chocked it up to a dirty screen and possibly even the scratches I made on it. I read that those things would "confuse" the digitizer. I also read that cleaning the lcd and replacing the new glass with uv-glue would fix any digitizer touch issues, by filling in the scratches for one and by making contact with my finger more accurate. Anyway, I installed the new glass onto the lcd with the loca glue. Everything was clean as far as I could tell. After reassembling the phone I discovered that the digitizer was doing the same thing as it was when it had no glass. And now, when I turn the screen on from it being asleep, I see a blur where the unlock symbol is for a couple seconds, as if my finger was there above it. Then it goes away and the screen doesn't recognize my touch. I checked to see if my other note 3 did that when I turned the screen on and it didn't, at least not until I did put my finger there. I did a factory reset on the phone, disassembled it again and cleaned all the connections with alcohol. Everything looks like it's set up correctly. Just wondering if anyone has any ideas that aren't "the digitizer is broken" lol. I realize that may be the case, but I'm not sure what I could've done for that to happen. This will be my last attempt at finding a different answer before I trash the lcd. Thanks in advance guys!
arstinince said:
Hello all, I want to first thank you guys for your support since I've joined up! I recently attempted a glass replacement on a note 3. ... This will be my last attempt at finding a different answer before I trash the lcd. Thanks in advance guys!
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Click to collapse
I presume you've been checking the sites for help & youtube videos on how to do it all? Can you think of anything you might have shortcut or done differently?
The fact the defect was there before the glass replacement suggests maybe there was either prior damage that you didn't notice before trying this, or you've perhaps moved the LCD in such a way that prior damage has become apparent. i.e. there was maybe hairline damage and as you moved things the edges moved apart.
Could it be something along the lines of the glue is a bit thick at one end so the screen is now not contacting properly? How much pressure did you use putting it all back in place? Did it take a lot to get it even?
Wish I could be more helpful but, it's not something I've tried. TBH I hadn't even released AMO screens COULD be removed from the glass...