Another 'sound, no picture' query. Tosh Regza 32XV555D

[tyler_d]

After a period off, the TV system turns on and operates normally for between 15 minutes and two hours. The picture goes off and is not visible with a torch in a darkened room, but the set continues to operate normally otherwise.

I've examined the component side of the power, system and CCF ht boards for visible problems, with no issues visible.

The system is 6-7 years old I think.

What is the next step?

[dick_barton]

Re: Another 'sound, no picture' query. Tosh Regza 32XV555D

Can you post some photo's of the circuit boards.
When you lose the picture can you see the backlights with the back off the set?
Have you measured any of the voltages on the power supply?

[tyler_d]

Re: Another 'sound, no picture' query. Tosh Regza 32XV555D

I'll measure the voltages from the PSU before and after the screen goes off. Then take out the boards and photograph them in daylight. The backlight is definitely off after the picture goes off.