Thanks.I tested the following in continuity mode.
PS601
PS602
PS603
PS604
PS605
They all have continuity across them. Resistance is 000.3Ω on all of them.
I'm sorry if this is the wrong place to ask.
I bought a junk SCHP 5000 from Japan. Seller said it wouldn't read disks.
However the console is stuck on the SONY Computer Entertainment screen after getting powered on. Originally it was looking normal but now it's black and white for some reason...