[Q] Replaced LCD twice, only backlight comes on... What to do, now!? - G2 and Desire Z Q&A, Help & Troubleshooting

Hey Boys n Girls!
I made a mistake and bought off eBay a phone with a "not working LCD":
" This is a used HTC Desire Z smartphone. The item was dropped on water and immediately pulled out. The LCD screen doesn't work anymore as some cable inside is cracked. Everything works fine, touchscreen, menu and the device boots fine, you can hear the sound etc but no image. Anyone can fix this if you have an LCD spare for HTC Desire Z and the phone can be used and works fine, just the LCD needs replacing. Comes with original box, manuals and battery but no charger or data cable. I want to sell this fast so Happy Bidding!"
, also ordered already from two different seller LCD replacement screens neither of them worked. Backlight works on both but nothing else. Im quite puzzled what to do next...
Anyone got any idea?
Please let me know! THanks in advance!

Sounds like some cable is not working, rather than the two screens you've purchased! There is a guide somewhere here for all of that stuff. Best of luck mate!

captainreynolds said:
Sounds like some cable is not working, rather than the two screens you've purchased! There is a guide somewhere here for all of that stuff. Best of luck mate!
Click to expand...
Click to collapse
If you could kindly link that guide, it would be very much appreciated! Thanks!

try searching for ribbon cable. You should prob just take it to a cell phone store. Phone geeks in San Marcos did my repair for 70. I was texting gf while playing golf in pouring rain.
Sent from my SGH-T989 using xda premium

Here is the link to the teardown guide: http://forum.xda-developers.com/showthread.php?t=863919
The flex ribbon cables are not that expensive. If you were comfortable replacing the screen, I would say you have the ability to replace the flex ribbon cable without a problem.

beefynick said:
If you were comfortable replacing the screen, I would say you have the ability to replace the flex ribbon cable without a problem.
Click to expand...
Click to collapse
Im going to order it tonight and give an update as soon as I got the flex ribbon cable.... I assembled and disassembled so many times already soon will be able to do it blindfolded

Also while you have it apart clean the logic board with denatured or pure alcohol and a soft bristled brush. Let it dry completely! That way it won't corrode further from the water damage!

killj0y said:
Also while you have it apart clean the logic board with denatured or pure alcohol and a soft bristled brush. Let it dry completely! That way it won't corrode further from the water damage!
Click to expand...
Click to collapse
I will do that since it will probably take like 2 weeks to ship the flex ribbon from China Thanks Man!

modzsi said:
I will do that since it will probably take like 2 weeks to ship the flex ribbon from China Thanks Man!
Click to expand...
Click to collapse
No prob cheap insurance plus it could even since a current or future problem I do this work for people can you tell lol. Denatured is best otherwise I think 97 is as pure as you'll find. Most stores carry the latter.

Ps be gentle no need to go medieval on it

Replacing the Flex Ribbon Cable solved my problems.... Cheers Everyone!

Related

[Q] Broken LCD Connector

I was replacing my wife's LCD on her EVO and broke the LCD connector (on the motherboard). Not the ribbon (that's fine) but the connector that the ribbon goes into. Would anyone know where to find one? Or maybe a workaround for the situation? Please get me out of trouble!
Thanks
chrismgan said:
I was replacing my wife's LCD on her EVO and broke the LCD connector (on the motherboard). Not the ribbon (that's fine) but the connector that the ribbon goes into. Would anyone know where to find one? Or maybe a workaround for the situation? Please get me out of trouble!
Thanks
Click to expand...
Click to collapse
You broke the offwhite part right? It happens alot lol
Sent from my PC36100 using XDA App
Yes, the white part and screwed up some of the prongs underneath. Any suggestions?
Thanks
one of our techs broke that one time and I had to replace the device. I was able to get it to work by taping that part with electrical tape just until the customer got their replacement but it won't last long man. I don't think it's a replaceable part though...at least I've never replaced it since we've had very few like that in our store.
OK, thanks
chrismgan said:
OK, thanks
Click to expand...
Click to collapse
np, sucks that those parts are rather flimsy...
Not replaceable and a Sprint tech will (should) notice that.
Kinda screwed.
Sunsparc said:
Not replaceable and a Sprint tech will (should) notice that.
Kinda screwed.
Click to expand...
Click to collapse
Oh we will lol but........ if you're from south Texas
Sent from my PC36100 using XDA App
I'd suggest a hot air station would do the trick to replace it, they dont like plastic components a whole lot but you can judge the temperature when you remove it, bloody ace for removing SMD chips or IC's..

Disassemble and reassemble of galaxy nexus :)

I have a few pictures of my galaxy nexus broken down if anyone would like to ask me questions on how and where things go they can. I actually find this phone to be very easy to get apart and if careful can be reassembled in 15 minutes. I was actually replacing my speaker with some old parts I bought off a guy. No more crackling! Anyways in the process grabbed some pics
U can see the first three are the screen bottom speaker, main board, vibe, etc. The last pic she's all back together
Sent from my Galaxy Nexus using xda premium
Somehow I imagined a picture of me tearing down a smartphone where I was photoshopped out and replaced with a picture of a dog in a labcoat saying: "I have no idea what I'm doing"
Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.
IINexusII said:
Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.
Click to expand...
Click to collapse
is the imei sticker that is attached onto the black plastic removable from the main board?
IINexusII said:
Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.
Click to expand...
Click to collapse
Yes sir....I just stuck a razor blade between them and the housing and they come right off connected to a gel like glue. This was good because sticking them back in place they actually stayed. U also have to remove the vibrator motor and the long black wire running down alongside the battery compartment (it has connectors on each end) then of course your two ribbon connectors for main board then one ribbon connector for bottom speaker. Didn't touch cams no need to.....very very easy job in fact it was to easy.
I have to replace my USB board (my USB port was damaged) and I am a newbie doing this kind of service myself. I bought it on ebay:
http://www.ebay.com/itm/OEM-Charger...ltDomain_0&hash=item35bc2f9280#ht_3392wt_1052
Do you think it is possible for someone with no experience to make it? I think I will try it myself, not in the mood to send it to some repair shop and wait 30 days..
juliano_q said:
I have to replace my USB board (my USB port was damaged) and I am a newbie doing this kind of service myself. I bought it on ebay:
http://www.ebay.com/itm/OEM-Charger...ltDomain_0&hash=item35bc2f9280#ht_3392wt_1052
Do you think it is possible for someone with no experience to make it? I think I will try it myself, not in the mood to send it to some repair shop and wait 30 days..
Click to expand...
Click to collapse
Yes for sure...but if u do not feel safe doing it then take it in. I know to get to the usb the whole speaker and housing comes off of the top of that. Which is one screw then a ribbon fairly easy....then u just work something thin in between that and housing like a guitar pic or Mac card. I would go with guitar pic tho so u don't mess the corners of your card up. I know that once the speaker portion is off u see in my first pic the USB I think has its on board. I truthfully did not take that portion of it out thought it was kind of pointless. If u need help I will assist u if u decide to do it yourself
sarni84 said:
Yes for sure...but if u do not feel safe doing it then take it in. I know to get to the usb the whole speaker and housing comes off of the top of that. Which is one screw then a ribbon fairly easy....then u just work something thin in between that and housing like a guitar pic or Mac card. I would go with guitar pic tho so u don't mess the corners of your card up. I know that once the speaker portion is off u see in my first pic the USB I think has its on board. I truthfully did not take that portion of it out thought it was kind of pointless. If u need help I will assist u if u decide to do it yourself
Click to expand...
Click to collapse
Thanks, I think I will try it myself, just have to wait for it to arrive.
juliano_q said:
Thanks, I think I will try it myself, just have to wait for it to arrive.
Click to expand...
Click to collapse
Yea dude pm me and I'll definitely help out
Thats pretty neat man, do you know where the GPS chip is?
I replaced my back cover and apparently I damaged the GPS chip cause I have NO gps lock, software side its ruled out (I flashed many diff ROMS, kernels and Radios and it used to work well before I opened up my Gnex)
Thank you.
where is the VZ LTE radio? maybe i can swap mine out for one that doesnt cause signal drops.
Sergio PC said:
Thats pretty neat man, do you know where the GPS chip is?
I replaced my back cover and apparently I damaged the GPS chip cause I have NO gps lock, software side its ruled out (I flashed many diff ROMS, kernels and Radios and it used to work well before I opened up my Gnex)
Thank you.
Click to expand...
Click to collapse
The battery cover? Hmmmm. I am pretty sure the GPS chip is on the opposite side of motherboard. Looking at ifixit photos it says right by rear camera on the opposite side of motherboard.
Edit...also if u look at first pic in my pictures look on right side of battery compartment . See the black wire with the connectors on each end? I wonder if the connector closest to bottom came loose or has something to do with it
10roller said:
where is the VZ LTE radio? maybe i can swap mine out for one that doesnt cause signal drops.
Click to expand...
Click to collapse
Not sure I have GSM model. And dude good luck with that unless u know how to solder chips on to motherboards that is nearly impossible and I think swapping a lte chip for another lte chip won't solve your problem
sarni84 said:
The battery cover? Hmmmm. I am pretty sure the GPS chip is on the opposite side of motherboard. Looking at ifixit photos it says right by rear camera on the opposite side of motherboard.
Edit...also if u look at first pic in my pictures look on right side of battery compartment . See the black wire with the connectors on each end? I wonder if the connector closest to bottom came loose or has something to do with it
Click to expand...
Click to collapse
Thanks, appreciate your time.
I checked out ifixit, thinking that in the process of removing the cover I could of hit the GPS chip or something, but since you pointed out that its on the opposite side of the motherboard that's not a possibility. Since I have not removed the mother board.
I have not opened it again, afraid of ruining something else.
But I guess I will have to in order to check the wire you speak about.
Salutations
I sent my phone in for repair to Samsung via Expansys for a bad external speaker. Back when it went bad, phone was too new to have all parts available as spares on the net plus the phone was still under warranty so I send it back to Samsung via Expansys-usa. But what I think happened is that Expansys didn't send it to Samsung and repaired it inhouse. I can say that because all screws inside the phone had chewed up heads and the repair didn't look good however the external speaker was working. First thing I found out that external volume rocker was not working anymore. So I send it back again to Expansys and I just received it back today with a note saying that the volume rocker ribbon pins have come away from the main board and taken the pin with them.
Bottom line is that they didn't repair the phone. Any ideas on how I can get this fixed? Do I have to change the ribbon? if I want to do it myself or this sort of damage requires a new board?
Any ideas comments are appreciated.
Edit: Link to photo showing the pins that are separated from the board
sarni84 said:
I have a few pictures of my galaxy nexus broken down if anyone would like to ask me questions on how and where things go they can. I actually find this phone to be very easy to get apart and if careful can be reassembled in 15 minutes. I was actually replacing my speaker with some old parts I bought off a guy. No more crackling! Anyways in the process grabbed some pics
U can see the first three are the screen bottom speaker, main board, vibe, etc. The last pic she's all back together
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Hi Sarni,
I accidentally snapped the ribbon (refer to attached pic, circled in red), and now my speaker is not working anymore. I guess that ribbon was for connecting the speaker and headphone jack? . What do you think i should do now, replace the whole piece?
I also intend to replace my damaged charge port, but not sure how to proceed for that.
Thanks,
Dennis

[Q] Digitizer problems

Hey guys, I'm back while I don't have my iPhone. Now I'm trying to get this damn phone to work again. R800x if you didn't remember. Now, every time I get a new digitizer, It doesn't work. I take the old one off and put the new one in, making sure all contacts in the ribbon are connected to the flex cable connecting to the logic board. Any suggestions to get this damn screen to work again?
Or if anyone has a working, but broken digitizer they replaced, I'll take it
savage24x said:
Hey guys, I'm back while I don't have my iPhone. Now I'm trying to get this damn phone to work again. R800x if you didn't remember. Now, every time I get a new digitizer, It doesn't work. I take the old one off and put the new one in, making sure all contacts in the ribbon are connected to the flex cable connecting to the logic board. Any suggestions to get this damn screen to work again?
Or if anyone has a working, but broken digitizer they replaced, I'll take it
Click to expand...
Click to collapse
It may be the flex cable, the little cable which connects to the digitizer is part of the flex cable i believe.
Nabeel_Nabs said:
It may be the flex cable, the little cable which connects to the digitizer is part of the flex cable i believe.
Click to expand...
Click to collapse
Except the front camera works (green and fuzzy with no quality what so ever, but works). That's why I don't think it's the flex.
Just replaced it with an extra laying around. Didn't fix it...
savage24x said:
Except the front camera works (green and fuzzy with no quality what so ever, but works). That's why I don't think it's the flex.
Just replaced it with an extra laying around. Didn't fix it...
Click to expand...
Click to collapse
Ah sorry, I meant the front facing camera cable, the green and fuzzy with no quality seems to affirm this. Here's a picture of it from ebay - http://i.ebayimg.com/t/Sony-Ericsson-Xperia-Play-R800-Ear-Speaker-Proximity-Sensor-Flex-Cable-Ribbon-/00/s/NzUwWDEwMDA=/$(KGrHqF,!lEE-j2UWj4YBP34C0rn4w~~60_12.GIF
Nabeel_Nabs said:
Ah sorry, I meant the front facing camera cable, the green and fuzzy with no quality seems to affirm this. Here's a picture of it from ebay - http://i.ebayimg.com/t/Sony-Ericsson-Xperia-Play-R800-Ear-Speaker-Proximity-Sensor-Flex-Cable-Ribbon-/00/s/NzUwWDEwMDA=/$(KGrHqF,!lEE-j2UWj4YBP34C0rn4w~~60_12.GIF
Click to expand...
Click to collapse
I tried two of them though... :/
Sent from my HP TouchPad using xda-developers app
Update: bought a new flex cable. Didn't fix it. Well, looks like it is the digitizer. Any other ideas?
Sent from my HP TouchPad using xda-developers app

I Can't Touch the Part of Screen Though Replace Digitizer.

When I disassembled my xperia play for the first time,
the screen digitizer was damaged by my mistake.
I can't sure that, but I guess it can be.
At that time,
the bottom of screen (about 1/3?) didn't work.
So I bought the screen digitizer,
and replace it today.
But the problem hasn't been solved all the way.
If separate into 6 parts the screen from top.
(For example the top part is 1st part.
And beneath 1st part is 2nd part.)
5th parts doesn't work.
But the bottom 6th part works well.
I don't want to buy else new screen digitizer.
Please let me know how to use my xperia play with any problems.
Please help me.
Thanks about reading my thread.
Jaehyeok Koo said:
When I disassembled my xperia play for the first time,
the screen digitizer was damaged by my mistake.
I can't sure that, but I guess it can be.
At that time,
the bottom of screen (about 1/3?) didn't work.
So I bought the screen digitizer,
and replace it today.
But the problem hasn't been solved all the way.
If separate into 6 parts the screen from top.
(For example the top part is 1st part.
And beneath 1st part is 2nd part.)
5th parts doesn't work.
But the bottom 6th part works well.
I don't want to buy else new screen digitizer.
Please let me know how to use my xperia play with any problems.
Please help me.
Thanks about reading my thread.
Click to expand...
Click to collapse
Are you sure it's digitizer problem? Maybe it's flex
I had similiar problem, but in my case whole touchscreen didn't work and it happened randomly on reboot
It turns out that when i was repairing my usb port i somehow didn't place flex cable properly and it was bended over that metal part of slider.
Once i reopen it (only the part with motherboard on it) and place flex cable properly, touchscreen started to work normaly
How old is your Play? When you opened it, does flex cable looks damaged?
Where did you buy your digitizer? If it was from eBay, you could ask for a replacement from the seller you bought it from.
Like Bakisha, it could be the flex cable. If you know the digitizer is working, it usually is the flex cable.
Bakisha said:
Are you sure it's digitizer problem? Maybe it's flex
I had similiar problem, but in my case whole touchscreen didn't work and it happened randomly on reboot
It turns out that when i was repairing my usb port i somehow didn't place flex cable properly and it was bended over that metal part of slider.
Once i reopen it (only the part with motherboard on it) and place flex cable properly, touchscreen started to work normaly
How old is your Play? When you opened it, does flex cable looks damaged?
Click to expand...
Click to collapse
In fact, the flex cable of my xperia play looks a bit little.
The black color had been painted on cable wear a little.
So do you recommend me to replace flex cable?
RoboticBuddy said:
Where did you buy your digitizer? If it was from eBay, you could ask for a replacement from the seller you bought it from.
Like Bakisha, it could be the flex cable. If you know the digitizer is working, it usually is the flex cable.
Click to expand...
Click to collapse
If I ask for sending normal item without any problem again, should I send to seller the screen digitizer ?
Jaehyeok Koo said:
In fact, the flex cable of my xperia play looks a bit little.
The black color had been painted on cable wear a little.
So do you recommend me to replace flex cable?
Click to expand...
Click to collapse
Well, you could open your Play and see if flex cable properly placed. Open slider and put that white plastic inside metal frame. Put back dpad part of phone back, but keep an eye on that white plastic, it have two holes in motherboard to go into, then screw those two screws on motherboard (so it will make flex cable plug in motherboard - look if jack is now properly inserted
Close it and try it.
If you again have problems with touchscreen, then you have two options. Replace flex or replace digitizer. It's hard to say wich is faulty...
Sent from my R800i using xda app-developers app

Changing the charge port on SM-T800 is relatively easy....

... if you don't do something stupid like I did. If you pay attention, research, watch videos, etc, you won't do what I did. I found a charging port on amazon that came with the tools needed to get the job done for about $15. I opened the case and all went well up to the point that I needed to disconnect the old piece. I followed all directions up to disconnecting the wide connection. There are 2. One right next to the port and the other at the opposite end of the ribbon cable. Not paying a bit of attention to what I was doing, instead of popping up the little latch that holds the cable down, I pried up the ribbon cable. Thus breaking off the connector that is soldered to the board. Now, I have a tablet that works until the battery dies.
Moral to the story, pay attention. Replacing the port is easy. Just pay attention.
Now, does anyone know if the connector can be replaced? Can I get a new board? Or am I out $400+?!
Follow-up question. I am looking around and it looks like I can get a replacement motherboard. Before I spend the money on a new motherboard (and hopefully not break this one), how will it function? I am rooted. Will I be starting from scratch with a stock tablet? No OS at all? Just fine and still rooted?
Thanks.
Bdozier said:
Follow-up question. I am looking around and it looks like I can get a replacement motherboard. Before I spend the money on a new motherboard (and hopefully not break this one), how will it function? I am rooted. Will I be starting from scratch with a stock tablet? No OS at all? Just fine and still rooted?
Thanks.
Click to expand...
Click to collapse
Did you ever find a solution? I just did the same thing. I was trying to be careful - but that top piece just broke right off of the connector to the motherboard. Am I screwed?!
arl16 said:
Did you ever find a solution? I just did the same thing. I was trying to be careful - but that top piece just broke right off of the connector to the motherboard. Am I screwed?!
Click to expand...
Click to collapse
What piece broke off? You might be in luck cause i have 3 tab s's taken apart right now and can probably send you the part you need. Can you pm a picture of the part you broke? The charging port is connected to a cable and i just had it apart. What did you break on it?
mikep2323 said:
What piece broke off? You might be in luck cause i have 3 tab s's taken apart right now and can probably send you the part you need. Can you pm a picture of the part you broke? The charging port is connected to a cable and i just had it apart. What did you break on it?
Click to expand...
Click to collapse
Wow - that would be awesome. Truth be told, I'm doubting this is something I'll be able to do myself, but I'm about to have a dead/useless tablet, and nothing to lose. So I'm willing to try!
Thanks!
Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!
arl16 said:
Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!
Click to expand...
Click to collapse
Unfortunately the motherboard i have is broke and it doesnt start up. I thought it was the charging port so i cant help you out. You can buy a new board for 99 dollars though or just buy a used broke one off ebay and switch the board out. It is very easy to do and there are videos on you tube. People have used ones for cheap with broke lcds or screen burn. Buy one of those and switch out the top board cause that is all you need. I have all the other parts but my main board has something wrong with it. If you do that just make sure you get the same model number cause i just bought a verizon one and the motherboard wont work with my att one. I have 2 att ones that i was able to swap out.
arl16 said:
Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!
Click to expand...
Click to collapse
You know i might have got my 1 tablet working and if it is i can send you the board. I will let you know tomorrow.
mikep2323 said:
You know i might have got my 1 tablet working and if it is i can send you the board. I will let you know tomorrow.
Click to expand...
Click to collapse
Awesome - thanks!

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