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

[domix]

Me again, tv was works now one month perfectly. Now it is 10cm out from wall niche.
Yesterday was working fine, but suddenly image shake, than goes black but sound was okey. I turn it off. Today same problem. If i check with flashlight, it black no image, but backlight is on :/

[Davi.p]

No need of flash light, it is bad screen lcd, or in second option bad cpu soldering, especially if no separate tcon, but Sony usually has it separate.. third option bad bga on tcon.. same two damn fault types as always, no chance for these crap products..

[Diah]

Me again, tv was works now one month perfectly. Now it is 10cm out from wall niche.
Yesterday was working fine, but suddenly image shake, than goes black but sound was okey. I turn it off. Today same problem. If i check with flashlight, it black no image, but backlight is on :/

XF90 series its SoC MediaTek MT5891 when it have BGA issue, screen will show as yours photo in post #8 ... re fellow it

[domix]

Hello, this one is here. I will reflow, with hotair station. The we will see, if it helps.

[Davi.p]

To make correct things you could have tried the screen self test / BWRGB test, to ensure the screen is working properly..