Help Please! My Xperia E4 Screen won´t wake up.

[AJValle]

Hello!
Well, the subject is pretty much it. After sleep, the screen won´t turn on. The LCD brightens up, but it´s just a black screen, no image at all.

It happened a couple times, but i managed to wake up the screen by connecting the charger; now, it definitely wont wake. I tried to restart the phone by the "OFF" button several times, even try to get into recovery mode(Wich i think i did), but still no image.
I can get calls, notifications, messages, the Notification LED works normally, even get into the camera and take a photo. Of course guided only by sound.

So, it occured to me that this might be a hardware problem, am i right? Any solution you can offer i will thank!
Thank you for your time as well

[Uliwooly]

Repair the phone with PCC

PC Companion (PCC)
http://support.sonymobile.com/us/tools/pc-companion/
 

Bridge (for Mac)
http://support.sonymobile.com/global-en/tools/bridge-for-mac/

 
Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Jake-SonyXperia]

Hi AJValle,

Welcome to the community,

Here are the instructions on how to perform this task.

Here's how to run the repair on PC Companion:

1. Install and open PC Companion then select Support Zone.
2. Phone Software Update.
3. Start.
4. Repair Phone
5. Continue
6. Accept data removal
7. Next
8. Wait for prepare
9. Select Phone
10. Follow the connection steps

And Bridge for Mac:

1. Launch Bridge for MAC without the handset connected.
2. On the Main Window select "Xperia > Repair Xperia Device".
3. Ensure the phone is charged and select "Ok" in the following window.
4. Select Continue on the following page.
5. Wait until the initialising step is finished the continue as below.
6 . Select your model of phone from the list that appears
7. Follow the connection steps that appear, ensuring that you are holding the relevant button down before during and after the connection phase until the update/repair begins.

Let us know how you get on.

[AJValle]

Thank you for your replies!
I did as you said. Install PC Companion and repair the phone. Everything went as spected at the begining.
However, the phone still presents the same issue, occassionally, screen won´t wake up after sleeping mode. So i´m still wondering: Is this a hardware issue?
It's safe to say that the phone has never suffered an impact or presented any kind of hardware/software bug. Should i take it directly to a Sony Center?
Thanks in advanced for your kind replies!

[Jake-SonyXperia]

That is unfortunate, in this case I would definitely suggest having a service agent check out the device. You can contact them directly, simply use my signature below to get the link.

let us know how you get on.

[AJValle]

For future references: 

The Sony Center would take too long to repair my device, even to diagnose it. So I dared to disassemble the device, (I'm an electronics student by the way) cleaned up the flex cables, connected them tight, and checked everything was right. 

My guess is that the screen flex cables was not connected as it should be. Happened to a friend's phone as well, so I think is not such a serious nor uncommon error.

The device works perfectly now, and I'm happy with it.

I thank you all for your replies 

Regards

[Jake-SonyXperia]

I'm glad you were able to resolve this issue. I hope you have no further issues.

[Roxxy]

my xperia e4 dual goes on black screen and won't wake up untill i restart my device......this only happens when i keep my phone idle for 2-3 minutes it goes black