Sony KD - 65XF9005 - No image, sound OK

[domix]

Hello,
at tv KD - 65XF9005 i have a problem.
Afrer a coupe of minutes (10-30) i got black screen, no image. But i have sound.

is this a common problem for this tv?

i attached pictures of inside. Supply board looks okey, no blowed caps.

[domix]

anyone have any suggestions

[nomoresonys]

So what is it doing, works correctly for 10-30 minutes or black screen all the time?

[EazyBone]

When it goes black take a flashlight to screen and get really close. Do you have a picture? It will be very dim so take your time looking for it

[domix]

When go black, than is no picture even no with flashlight, backlight is off.

I think because TV is mounted in the wall in a drywall niche, and have ony half a cm free space. I think its overheated at the back. Now i have it withaout a back cover ona a table, and now is turned on 4hours and everything is fine.
now radiators on montherboard come to 80degrees. I think when is in the wall this temps goes way up.

[EazyBone]

I would look for the picture again when it's black. I am a TV installer and we install all TVs as close to the wall as they can get . Going black with sound is a indication of backlights going bad.. so I would look again when it happens again. Is this an edgelit tv?

[tiki66]

When go black, than is no picture even no with flashlight, backlight is off.

Does the LCD turn off or does the backlight turn off?!

@EazyBone it's and FALD tv with LD board, same principle as that 85x90CK you did the other day. If it was backlight error, it should trigger 4x red blink

[domix]

After 8 hours of youtube 4k video i get this on screen. Turn off for 5 minutes, then image is back