Yeah, just another 17$ wasted I guess.
I made a bet about the connector and the specs when I bought the thing...
Yeah it did say "For parts. Does not turn on. Unknown issue" in the item.
But when I got it it powered up, but no video.
So now I finally decided to probe the DVI connector and there are no signals on any of the TMDS pairs, but there's some 5V on the DDC signals. Maybe there's a dead DVI driver in there.
The problem is the thing is built like a tank, and it's 75% power supply boards. The logic is buried in a metal cage.
Ho well. Thanks for the comments. Too much work for now.
Unless someone knows the pinout and protocol of the service port?