Capacitive Buttons not working. - Epic 4G Q&A, Help & Troubleshooting

Recently i had to change the flex cable on my epic, so i ordered a new one online i changed it put everything back together i made sure everything was backtogether and when i powered on the phone my capacitive buttons such at menu, home, back, and search didnt work. so i thought i assembled it wrong so i went back and still. so i got curious and put my old flex cable and bam they worked.. any suggestions as to why they dont work with the new flex cable?

Could the new cable be bad? Being that you kinda narrowed it down by trying the old one again...

i hope not because its suppose to be new...do you think i could take it into sprint since there is no seal that has to be broken when opening?

I would have went there first. Why did you have to change it to begin with?

Related

Missing Ribbon/Flex Cable?

Ok so long story short, I dropped my phone, bought a new digitizer and front bezel/housing, and replaced the 2. Now when I was putting it all back together I noticed that it was missing the ribbon cable that attaches right next to the trackpad. I double checked EVERYTHING and did not see this cable anywhere. It is the cable that makes the front speaker work and the touch sensitive buttons light up.
Was there something I missed, did I not buy everything? Every place I went to and video I watched said nothing about having to buy an extra ribbon cable. It's not a crazy nuisance, but I would really like to have the whole phone working how it is supposed to, it's annoying to always have to have it on speaker phone.

Flex Cable change gives errors PLEASE HELP

Hi dear developers!
I got a Touch Pro 2 from a friend, it's a GSM device he bought in Germany (O2). I changed a few parts but messed the main flex cable. The part from the power button is not connected anymore, a clean cut through, no repairs possible as far i think. So i bought a new one over ebay from Hong Kong. The seller told me it's for a GSM device BUT the cables do not look the same. The production date is 2008 and the damaged one was produced 2009. I built everything together and now the big surprise:
Phone boots normally but when the Home screen appears, it is always in landscape mode. No matter if the phone is closed or the keyboard open. I can only change the screen over advanced tools, but after soft reset again only landscape mode. The buttons for calling also do not work (those two down on the screen when you want to call someone or end a call ---> no reaction).
A hard reset and new ROM (energy) didn't change anything. By the way, the keyboard only fires up after pressing a button. Before it automatically lightened up after sliding.
What the hell is wrong now, did the send me a CDMA cable? Where is the difference ? Please help me i do not want to spent another 30 bucks again for a proper flex cable.
Edit: I disassembled the phone again and took a closer look on the flex cable: the lower part (with the LCD connection etc) looks quite same except for 3 or 4 transistors and their position on the PCB. The upper part with the earpice looks way different. The positioning of the single parts is not the same. But how can that interfere ? Guess there is no problem with the mainboard or the LCD (which is brand new).
Here are some pictures
h**p//img28.imageshack.us/img28/1514/image2sh
h**p://img849.imageshack.us/img849/8167/img1609m.jpg
OK, i solved the problem. The guy who sold the flex cable sent me a older one as I described. This thing was fully responsible for the errors. Bought a new one and everything works fine now^^ So if you ever want to change your Flex cable take good care which one you buy (especially on ebay!)
Btw: The display and the digitizer are glued and IF you want to replace any of those two, do yourself the favor and buy the complete bundle !!! I made the mistake and tried to replace the digitizer and cracked the display. There is no way as far as I can say, that you can manage this.
Bye
Can u post the seller info? Im in the same situation w a different phone... Thanks

[Q]Xperia Play with a messed up(grey) screen.

Now I have tried looking up this problem, though not many results as I'm not really sure what I would exactly describe the happening of my screen besides grey. So forgive me if there has been questions like this already answered.
"Right now my Xperia Play screen is messed up screen. It started today when sliding the gamepad would freeze the system. Now, the screen is making this grey screen (pictures below) and freezes. Sliding out the gamepad and sliding it in seems to unfreeze it for a few seconds sometimes. Though, mostly, there's this. Is there any way I can maybe completely wipe my phone and reinstall Android? I have already flashed it once. Or is this a hardware issue and will I have to go to AT&T to see if I'm able to get a replacement phone?"
Like I said, I've already flashed it once. Did a Factory Reset before hand, though I didn't expect it'd do much. So any other solutions?
Maybe you should head to Sony Centre or AT&T to ask whether what's wrong with it. A reminder, unroot your device and get back to stock if you have custom rom and rooted your Play.
i think when you slid the gamepad it removed the cable connected to the screen. what was it called can't remember
I'm getting this a lot. I think there is a ribbon cable loose somewhere. I'll look into taking it apart sometime.
Same problem as my phone. The slider flex cable is the problem according to 4 old threads I found. If you're still under warranty, send it in. Otherwise, you can buy a new cable on Ebay like I'm doing, for 11 bucks and install it yourself.
...
captain67 said:
Same problem as my phone. The slider flex cable is the problem according to 4 old threads I found. If you're still under warranty, send it in. Otherwise, you can buy a new cable on Ebay like I'm doing, for 11 bucks and install it yourself.
Click to expand...
Click to collapse
were you able to fix it by changing the flex cable? i did change the flex cable but still same problem.
i don't think that the problem is the flex cable.. any idea guys?
zero801 said:
were you able to fix it by changing the flex cable? i did change the flex cable but still same problem.
i don't think that the problem is the flex cable.. any idea guys?
Click to expand...
Click to collapse
The problem is the flex cable, as I have the same problem.
You can find a replacement cable here.
http://www.ebay.com/itm/Slider-Slid...059?pt=LH_DefaultDomain_0&hash=item3ccc0f2003

[Q] What is the purpose of the front camera flex cable?

Recently, I disassembled my Sony Ericsson Xperia Play R800at. I was replacing the housing and digitizer. All went smoothly until I missed an important step. There was a black tab that holds down the flex cable that connects to the digitizer. I forgot that step and my flex cable ripped.I have ordered another as a replacement. I understand that this will cause the digitizer to not work, but I have more issues, and I want to know if they are due to the missing cable.(the ripped flex cable.) I assembled the phone and the screen functions normally. As to be expected, I can't interact with the screen. However, Now my search button and settings buttons aren't functioning. My home and back buttons are working although. Also, My phone will not charge anymore. Is this due to the missing flex cable? I hope I didn't accidentally screw anything up. I was really careful, so I don't know why they won't function. I really hope that these issues are due to the missing cable. :silly:
Sorry, I am not allowed to post links.It has the camera and earpiece on it and is attached to the slider. :"(
How. Could u miss a step itsm really easy to take apart and put together its the flex cable garunteed
Sent from my Sony Tablet S using xda app-developers app
Tutorials
Most of the tutorials seem to be only of disassembly. Little to none are of reassembly. I wrote down a list and reversed the order, but as it got closer to assembly, I started to assemble it myself. Big mistake. I assumed the black tab was only there to hide the chips.
Charge Recognition
It actually can charge, but only when the phone is powered of. This must be due to the missing components. Maybe because some parts of the phone aren't connected, the phone will not recognize the charger when powered on. What a relief...:angel:
Just watch dissassembly in reverse
Sent from my Sony Tablet S using xda app-developers app
I got the replacement part. I even replaced the slider. I transferred the button cable to the new slider along with the main flex cable and the camera/earpiece flex cable. I am confused. I am inserting the flex cable into the digitizer slot, but it isn't working. I assumed there was a lock mechanism of some sort, but still no luck. I am not sure why it isn't going all the way in. Reversing the steps just isn't working. Placing the flex cable in is way harder than taking it out. Is there a certain way to place this cable in. What I am in need of is a picture of how a functioning digitizer's attachments look. Are you supposed to be able to see the golden tip of the flex cable?(Again, I am speaking of the flex cable with the black tab covering it. It is very small.)
:crying:
Lock.
There were locks for just aboul all the ZIF Connectors. Sony Ericsson's manual is the best!:good:
I tried again using the locks on the slots but it still wont work. Even with the manual, no luck... Now, it is charging normally, even while on. This indicates that something has changed. I wonder why the digitizer isn't working though. Maybe I should see what happens If I revert back to my old digitizer...

[Help] Touch screen problem

So my xperia play had this fuzzy screen problem, after I bought the flex cable and replacing it I powered up the phone and seems it was working. Although the touch screen went completely unresponsive(buttons and gamepad work though). So what could possibly went wrong?
EDIT:Touch screen was working with the other flex cable.
Well this might seem like common sense but...maybe the new flex cable is also bad? I dunno :|. Did you try reusing the old cable to see if the touch screen worked again?
|SavageD| said:
Well this might seem like common sense but...maybe the new flex cable is also bad? I dunno :|. Did you try reusing the old cable to see if the touch screen worked again?
Click to expand...
Click to collapse
I might try putting the old one (with the fuzzy screen) again and hear if it does the unlock sound.
Will update with my findings.
i think youre moved tochscreen cable from it's place.

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