Display problem - screen does not start

[hp]

I have a Neo V (MT11i) which giving continuously problems from past 3 months. Phone does random problems each time. 
Present issue is the Display of phone does not start every time when key is pressed even when a call comes is may or may not display the screen. In that case i have to receive the call by touching the touch and sliding fingure by that area where it displays for receiving the call while no display and such a way the call is  get received. Means phone touch working fine but screen display have problem.

For the same i have given my phone to Sony Care they took it for 1 day checked it and just formatted and returned me with the latest version of android (normally they return with starting android version with which we bought ). The problem raised again after 15 days. I posted earlier ,then i was advised to use Update Service of Sony and reinstall it. I done it  today but there is no no change in condition. Please tell me what should i do to resolve it completely.

[dimitrios]

I have very similar problem

After almost two years having this phone working properly, I decided to move to clean version of ICS (without any local carrier garbage). I used official update guide with flash tool and rooted my phone. No boot unlocking performed. Everything was working properly for about month or two, but after that some lags with screen started.

Many times the phone’s display remains off after unlocking. I feel that phone is working, there is vibrating while unlocking and sounds of clicks and there is light under navigating buttons. So I’m locking phone again with power button and try to unlock again. That might succeed after one or two attempts like this, and might take longer. After the display turns on successfully, phone is acting as usual.

I tried “Update Service” but it tells me that I have latest software. Flashing back to GB or reflash it again to ICS does not help.

For now I’m leaving phones display active while charging and that helps me to have it available.

I doubt that it is worth to give to service repairs because it will cost too much. My question: is it a LCD that makes the problem? I’m thinking just by a new LCD and replace it, will it help?

Any help will be appritiated