Turns off, no light or warning, just off?

Mine is doing nearly the same thing. Turns off in the same way, no light or warning, just off. But mine can go for hours before it happens, I pull the kettle lead and plug it in again and it comes on again for a while. I had the PSU replaced by a company but it is exactly the same, maybe worst as it don't stay on as long as it did.

Have you found the answer cos I really want it fixed?

Cheers