Hello. My friend's zero 'died' and I'm trying to fix it. Anyone know what else I could try before I give up?

When I turn it on I see the Vu+ splash screen, but then the screen goes black and does not boot the image. The TV is still getting a video signal from the box though, it's just a black screen.

I've tried re-flashing OpenVIX.
Tried the original image from Vu+.
Tried re-flashing the bootloader in case it was damaged.

I have tried using the A/V cable instead of HDMI and have the same problem.

I believe the problem came about from switching off the receiver at the wall without powering it down.

Is it a write off?