I got a RROD 360 on craigslist.
Replaced thermal comp w/AS5.
Noticed fan wasn't even coming on when I tried to overheat it.
Swapped power supply with known working one.
Now what I'm getting is the startup animation swirly thing freezes and sometimes goes to solid green screen.
I get no red lights or error codes.
Here's a few vids for clarification: