Update:
So I've done a little more experimenting and ordered another low-priced non-working PSOne, the listing for which described the motherboard as needing repairs but the optical drive worked when tested with another motherboard.
First I tried tweaking the potentiometer on the original...
Summary:
I have an NTSC PSOne (SCPH-101) that seems to work just fine with the exception that it requires a "warm-up sequence" that involves getting it to boot to the red "Insert PlayStation 1 Disc" screen with a disc spinning inside and letting it sit for a few minutes before rebooting. After...