Develop Bugs

Fuzzy screen? Help :(

My desire Z is reasonably new a few months old. But Itd been let without use for about a month and when I took it out I noticed now when I open the keyboard the screen goes purpleish, not all over but tinged in places. White is purple in some places and there's green blotches near on screen icons. It looks like the colours have been dragged to the right slightly. I think its a hardware issue but its a pain
When keyboard is closed the problem usually isn't present or sometimes the distortion is minimal. ALSO iv now noticed the hard QWERTY keyboard no longer seems to function right eithar. Some letters arnt working most of the time.
Anyway ink how to repair it or know a guide? I this it mit be something to do with the cable.

If you want to strip your phone down to check that the ribbon you see when sliding the keyboard out then look at this
http://forum.xda-developers.com/showthread.php?t=1003310
There is videos showing you how to take the phone apart to replace the hinge spring,sounds to me to be a faulty display though.
If you do take the phone apart there is a screw with void sticker so your warranty will be good and gone,if it is a faulty display you could still un root and get it replaced?
Wait to see if anyone else has any ideas before breaking out the screwdrivers,

No its not a faulty display. Display is ok when screen is closed. Also I used a tweezers to push the cable in as much as I could at the back and it fixed the screen. . . . .QWERTY was still not as good as it shud be (but slightly improved) but after maybe 15open and shuts it came out again.
So this means I have to open it and unloosen it right? No simpler easier way to do it?
And the keyboard problems are caused by the cable too afaik.

The method in the video is the only way I know to gain access to the ribbons socket,still think warranty is your best bet as you have pointed out the keyboard is faulty,if you open it up and cant replace the void sticker/something goes wrong,then the warranty is gone and you have a broken phone...........................

Oh I forgot to mention I have no warranty so its no loss to me xD. The keyboard was fine when I got it though so it didn't come from factory faulty.

Ok then,if you want to have a fiddle about inside then you will need a 5 Torx driver to open up the back and a philips(very small)helps to have a magnetised one as the screws can be fiddly once you pop the case open,watch that video in the link I gave you to see how its done,best of luck

Lovely I'll give it a go. Thank you

Good stuff,If you need any advice PM and will see if I can help bud.

[Q] LCD Flex Cable Connector Port Broken

Hello, I saw that someone else asked a similiar question before but they did not word the question correctly and got little help.
On my HTC EVO logic board, there's three tan "ports" (I don't know what they are actually called). One for the front camera, one for the LCD, and one for the front panel.
While walking home one day, my screen started showing a dark spot. The spot got bigger, and I decided to take apart my phone (something I'd done before a few times) and try to clean things up. I put everything back together, and the LCD would not come on. After numerous tries, I finally decided the LCD was damaged. As I went back in the phone, I saw that regardless of whether you flipped the black tab on top of the LCD tan 'port' back or forward, the cable was capable of being pulled out, e.g., it was not secure. At the time, I thought nothing of it, but now that my new LCD should be here, I'm worried.
Is my LCD not working because the 'port' is broken? If so, what can I do to repair it? (I heard it is very difficult). I'm worried, because I paid a lot to buy a new LCD and will be unable to send it back.
http://guide-images.ifixit.net/igi/ZYHLZwIIVhjilEpT.large
Also, my front panel cable never sits 'perfectly'..that is, I have to connect everything else first, and then try my best with the front panel. The tape does not stay down flat completely.

These sorts of connectors can be fixed,but there is quite a bit of skill involved. Upload a picture and I can tell you better how hard it is. What I can tell you is that you probably cant do it yourself. I base this on the fact that those who have the necesesary skils will instantly know its going to be a pain. In fact,its easy to screw it up ,and sometimes you do,even if you DO know what your doing. Since I dont want to take my phone apart,Ill need to see a picture of it before I can tell you anything more. One thing to keep in mind is that sometimes the ribbon cable CAN be pulled out anyway,and is making good contact and there is some other problem. If you have not installed the new LCD,install it and see if it all works. If so,your good to go. As a general rule,the connectors are delicate and its not a good idea to pull them out. In fact,dont disconnect them if you dont have to. They have a limited number of connect/disconects they can take and they are very easy to break.

pflatlyne said:
These sorts of connectors can be fixed,but there is quite a bit of skill involved. Upload a picture and I can tell you better how hard it is. What I can tell you is that you probably cant do it yourself. I base this on the fact that those who have the necesesary skils will instantly know its going to be a pain. In fact,its easy to screw it up ,and sometimes you do,even if you DO know what your doing. Since I dont want to take my phone apart,Ill need to see a picture of it before I can tell you anything more. One thing to keep in mind is that sometimes the ribbon cable CAN be pulled out anyway,and is making good contact and there is some other problem. If you have not installed the new LCD,install it and see if it all works. If so,your good to go. As a general rule,the connectors are delicate and its not a good idea to pull them out. In fact,dont disconnect them if you dont have to. They have a limited number of connect/disconects they can take and they are very easy to break.
Click to expand...
Click to collapse
Well, I don't really have a means of taking a quality photo except with my computer webcam but I'll try in a second. I can't really show you because there isn't much to see. The little black bar that flips up and down to 'lock' the port is ineffective; the cable can be pulled out regardless. I know I can't fix the port/connector by myself, so I'm hoping that's not the issue. You have given me a lot of hope though. The new LCD should be here by Wednesday at the latest, so I'll be able to test it then.
Does my front panel affect the LCD? Since I dropped my phone on the corner, even with a new panel it does not sit 'perfectly'. I don't think they're related though.

BluRngerGurl said:
Well, I don't really have a means of taking a quality photo except with my computer webcam but I'll try in a second. I can't really show you because there isn't much to see. The little black bar that flips up and down to 'lock' the port is ineffective; the cable can be pulled out regardless. I know I can't fix the port/connector by myself, so I'm hoping that's not the issue. You have given me a lot of hope though. The new LCD should be here by Wednesday at the latest, so I'll be able to test it then.
Does my front panel affect the LCD? Since I dropped my phone on the corner, even with a new panel it does not sit 'perfectly'. I don't think they're related though.
Click to expand...
Click to collapse
I dont think so. I bet your ok. Just dont keep playing with the connector. I know,Ive done it. I sit there messing with it,wondering,is it broken? Is it good? Then the little black peice comes off in your hand or the plastic breaks and "well its sure broken now!" Remember,that little latch does not so much hold the cable in place as hold the cable against the contacts,if its making contact,its good to go.

Hi, all. The new LCD I receieved did not work. There are very minor differences in the two; such as some type of blue gunk on the silver part of the LCD, the connector is more of a dark orange on the new one while the original is a yellow-orange, etc. Also, again, the connector does not 100% fit in the slot. It goes in, but a small corner sticks out a bit and you have to either hold it in or clip it in [which I can't, because the black clip is broken].
The only possibilities I can think of are
A] Because the little black thing is damaged, no LCD will work in it. Therefore I need a new phone.
B] The LCD does not work.
C] The LCD is the wrong size.
At this point I want to just give up and get a new phone, which is very heart-wrenching because I love my EVO and I doubt I can afford the only other phone I like, the Samsung Galaxy S II Epic Touch 4G.

Is anyone able to identify what connector is used on this phone for the LCD? I broke a pin on the connector while trying to repair a cracked screen. I would like to buy it and re-solder it on to fix the phone.
Can someone link the correct connector maybe from digikey.com?

Broken latch
I too have a problem with the connector... the plastic part that connects the ribbon cable to the main board has broken. There must be a place to buy these tiny plastic latches... does anyone know? Your assistance will be greatly appreciated!
Mac-

[Q] Unglued cable digitizer Samsung Galaxy Note 2

Hello!
I just finish to "unglued" my digitizer cable on my note 2 ,
Please, just take a look at the picture, maybe can I do something to put it back.
Look like unglued..have you any idea if that flex cable it's glued or soldered ?
Thank you very much.

Wow.. I just did the exact same thing yesterday.. same spot on the cable and everything. I did it when I was replacing the glass.. I've tried taping it back.. and now I've tried gluing it , the touch kinda works but really inconsistent and annoying. I've spent way too much time trying to fix it and think I'm just gonna sell as parts now. What did you end up doing? Any luck getting it reattached? If you were successful please let me know what you did.

tri0xinn said:
Wow.. I just did the exact same thing yesterday.. same spot on the cable and everything. I did it when I was replacing the glass.. I've tried taping it back.. and now I've tried gluing it , the touch kinda works but really inconsistent and annoying. I've spent way too much time trying to fix it and think I'm just gonna sell as parts now. What did you end up doing? Any luck getting it reattached? If you were successful please let me know what you did.
Click to expand...
Click to collapse
For me, was no way to put back this flex cable... and I think its close to impossible to make something good with this display.
I just stored that display ....for don't throw it.
Good luck!

this is a usual ribbon cable. i teared mine replacing the screen... will try to replace it and report back.
maybe it will require light smd oven soldering and that will suck big time. maybe i can just pressure it down somehow. your cases are much better, you still have the original cable and half of it is already soldered making it much easier to solder the rest.

gcbxda said:
this is a usual ribbon cable. i teared mine replacing the screen... will try to replace it and report back.
maybe it will require light smd oven soldering and that will suck big time. maybe i can just pressure it down somehow. your cases are much better, you still have the original cable and half of it is already soldered making it much easier to solder the rest.
Click to expand...
Click to collapse
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks

Goathier said:
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks
Click to expand...
Click to collapse
probably. i hope you haven't glued the glass already
edit, actually that one probably have that ribon cable already attached. i can only see the plug that clips on the motherboard(?)... not sure that is what you want

Goathier said:
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks
Click to expand...
Click to collapse
thats not the same part, the part u listed on ebay is for the stylus. U can easily tell its not the same part as shown in the original post. Check out this youtube video at the 20:50 minute mark, it will show u the exact parts and u can tell. Youtube: https://www.youtube.com/watch?v=bxgZeb5QytM
Unfortunatly the part the original poster pictured is part of the digitizer and is near impossible to fix once ripped. all ive been able to find online is that ribbon cable being sold with the digitizer itself. If anyone else actually finds the part shown in the original post please do post back.

Not so usual screen problem

Hello guys, after screwing up my phone I'm using my tablet a lot more. So i'm experiencing some problems. The screen problems increase when i use the tablet more often, but i don't have this phantom touch problems it's actually the screen stop working. It just stays on lock screen and me unable to unlock it, i restart the tablet and still doesn't work. However the strange part is that when i hit the back of the tablet in something it immediately starts to work??? I know about the N7 touch screen issues, but i thought they were software based? But mine looks like it's hardware problem? Can you explain me and help me? Thanks.

Can somebody answer me??

yanis15 said:
Can somebody answer me??
Click to expand...
Click to collapse
If it's hardware, it's most likely, though not exclusively, the cable connections. You need to take the back cover off, and reseat them one by one. Takes a little work because there are 3 cables, one with 2 prongs. Reseat all of them if you can since you don't really know which one caused the problem.

Warranty?
Ok i saw some videos that it may be replacing the screen cables just as you said, but i have warranty. What to do? If i take it to warranty center it's most likely it will work there at the moment? It stops in random times.. What to do?

Removing the back without voiding the warranty is very simple but make sure that you will wear some sort of protective gloves and not touch any copper foil at all ( or you end up with finger prints.. ). Simply reattach the touchscreen connector cable only and you´re good to go.
yanis15 said:
Ok i saw some videos that it may be replacing the screen cables just as you said, but i have warranty. What to do? If i take it to warranty center it's most likely it will work there at the moment? It stops in random times.. What to do?
Click to expand...
Click to collapse

Thanks for the info. Actually i can fix it easly not by hitting, but just by pressing the back cover. I saw where the cables are in a video and can permanently fix it by putting something between the back and the cables to keep thwm in place. And when i press they just go in place. For now i will just press it when needed. If the problem increases i will open and reattach all cables in place. Thanks for answers.

Unit is working but screen is black - OFF

I have a KGL unit with RK3188 quad core CPU and 1024x600 screen.
I was working with custom ROM (made by Malaysk)
I didn't update anything recently.
Suddenly that morning, the screen is black.
I am able to hear the radio, and Bluetooth calls are being transferred through the unit, but the screen is totally black, zip, nada, nothing at all.
Any ideas what could get wrong?

I've had this happen before also. Do you see any boot logo at all?
Dave

I see nothing at all. Black all over the way.No logo
Sent from my A0001 using XDA-Developers mobile app

that is a hardware failure
contact yoru seller

unfortunately, the seller completely ignores my messages.

amir77a said:
unfortunately, the seller completely ignores my messages.
Click to expand...
Click to collapse
Did you tried to enter the recovery or it is shows black screen also?
If yes, maybe your display panel is wrong. If you seller ignore your messages, try to check your panel's contact to the board.

Check to see if you can get into recovery. If screen works, turn off lights when in rom. I had issue with auto brightness which was too low. Only way I could fix was to wipe and reinstall and turn off auto brightness.

Just updating... it was a hardware problem.
Flat cable problem + certain transistor.
Thanks for your comments.

How did you figure it out?
Dave

TT_Vert said:
How did you figure it out?
Dave
Click to expand...
Click to collapse
The buttons were OK, I was able to listen to radio, switch stations (via the wheel control), and even BT calls went through.
That made me guess that this is a hardware problem, and not software.

and no matter what you did you never got video ? Ive got this same problem but after a hard reset Ill get the video back sometimes.

TT_Vert said:
and no matter what you did you never got video ? Ive got this same problem but after a hard reset Ill get the video back sometimes.
Click to expand...
Click to collapse
Actually, I even didn't try to hard reset the unit.
Took it from my technician, and it was working, without any hard reset.
To be precise, I'm going to visit him again tomorrow, since the colors on the screen are a bit on the green side, and a bit smeared.
Not a disaster, but not as it should be.
I guess one of the flat cables inside the unit, is not in its place.

amir77a said:
Actually, I even didn't try to hard reset the unit.
Took it from my technician, and it was working, without any hard reset.
To be precise, I'm going to visit him again tomorrow, since the colors on the screen are a bit on the green side, and a bit smeared.
Not a disaster, but not as it should be.
I guess one of the flat cables inside the unit, is not in its place.
Click to expand...
Click to collapse
Did the technician just reseat the cables or was something actually replaced?

jakejm79 said:
Did the technician just reseat the cables or was something actually replaced?
Click to expand...
Click to collapse
At first replcaed something... the second visit, probably things were a bit loosen up...

amir77a said:
At first replcaed something... the second visit, probably things were a bit loosen up...
Click to expand...
Click to collapse
Any chance you could get details on what was replaced?

I had a similar issue - would lose screen output, it would go either black or white. Touch screen would still work, and radio/BT as well.
Then I'd disconnect the flat cable and reattach it, and it would work for a couple of days. Final solution (it seems) was to hold the flat cable with tape/hot glue!

Thank you, mine just went out again, it was fine for a month or so after reseating all the ribbon cables in the ZIF connectors, I'll do it again tomorrow and try securing them with some tape.

markinhosmrk said:
I had a similar issue - would lose screen output, it would go either black or white. Touch screen would still work, and radio/BT as well.
Then I'd disconnect the flat cable and reattach it, and it would work for a couple of days. Final solution (it seems) was to hold the flat cable with tape/hot glue!
Click to expand...
Click to collapse
did you reattach the flat cable with the radio on or off please help me because my head unit had became with black screen but the radio function normaly

Same symptoms here, any updates on what to look for? screen isn't even dim, touch works, sound works, it connects to my hotspot, but no visible screen, Witson PX5.
Which transistor ? I have a multimeter handy