I just today finished modding my fourth Sony PS-1 (Model 1001); the output stage, etc. The only requirements for anyone to do the same is to be able to solder, desolder and to think and reason. The end results will reward you for your small effort. In a few days I'll pull the ps board and remove the caps and replace with better quality ones. I'll then relocate the ps to a external box via a umbilical cord. This will greatly reduce the heat in the main console.
You really need to connect the video out a TV, monitor, etc. to see and use the menu and to learn to use the RC properly.
DIY mods of the Sony PS-1 (Model 1001 with 4309 dac chip) can be found here.
Also a tutorial on how to adjust the laser to read all your discs ( a small screwdriver and multimeter is required).
http://dogbreath.de/PS1/index.html
The RC transmitter and receiver can be found on, yep, eBay.
RC: Sony-10150
RC Receiver: Sony SCPH-10160
RC Receiver: Nyko Remote Free with dip switches set at #1 on, #3 on, #5 on.
I would be pleased if some of you took advantage of the free mods info and DidIY.
You won't regret it.
Regards,
Marvin