Sony bravia 52 inch power light on but the screen is black and no sound. tv was working fine yesterday no problems or issues have ever occurred.

LCD Easy Fix (sound but no picture) - YouTube

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How to fix sony bravia has black screen - Digital TV - Streaming ...

www.tomsguide.com/forum/56867-4-sony-bravia-black-screen

Aug 19, 2014 - 12 posts - ‎11 authors
Hello, My Sony Bravia TV screen has gone all black. The green on/off light comes on,but no picture appears. The model ... Your solution solved the non picture for live tvbut still no picture (just sound) fir OnDemand. Score. 0. No picture on LCD TV with HDMI cable plugged into ...
5 posts
Aug 4, 2014
Tv problems picture ok but no sound - HDTV
4 posts
Sep 8, 2011
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Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

check brightness to increase full

get a new one ,cheaper than fixing

It sounds like a main board failure but could be a power supply issue as well. The set will need to be diagnosed

Since the screen is coming on I do not think it is a problem with the power supply. It sounds more like a problem with the audio/video main board of the set. Is the set under warranty?

Its a TAB bond Problem with the LCD. You can take apart the TV and install a rubber Bumper to put pressure on the TAB. TAB bonds always get worse... I dont know how long it will solve the issue... but u can get a little more life out of it.
Rember when working with the TV the voltages can kill!!
Heres a link to see someone fixing.
I have the same TV...same problem...common problem...unless u ask Sony.

I have the same tv with the same problem. My tv is about 3 1/2 years old. I took it to the shop yesterday and today they told me that I had a bad lcd panel and a bad FL1 circuit board. They also told me it was going to be $3800.00 dollars to fix. I am now on my way to buy another tv, needless to say it will not be a Sony. Sony knows about this problem and refuse to do anything about it. Good luck.

Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.

To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).

i have a sony bravia 50 inch rear projection tv kdf 50e2000 the problem is it fail to switch on when it did it swicth on had black line cross the screen