[stomachmonkey]

IMHO it's not worth any more of your time.

While a bad GPU could be the cause of its current problem it's in addition to the problem it has caused.

GPU won't come online until later in the boot sequence. You appear to not be even getting to that point.

So either the PSU is bad or the MB which is my guess right now.

Whatever it is at this point the likely fixes far outweigh the value of the box as a whole.

Part it out.

Or put it back together and I'll give you twice what you paid for it plus shipping.

I offer that because I'm in a similar boat. Had someone drop one off at my place after he broke it trying to install an SSD which I told him not to do.

I've narrowed it down either LCD or backlight but just like yours, it's not worth it for me to spend much, if any money trying to salvage it.

I collect and fix older gear because there is always a low income family or local congregation that needs a basic computer.

2 months ago I was able to outfit one of the local Sunday schools with HDMI laptops for their classrooms for essentially peanuts and my personal time.