PS5 Pro Power Rails

I was recently gifted with an eBay wonder. I thought I was getting a PS5 slim as the guy took it all apart and I was going by 1 photo.

Anyways, this was to be a bad HDMI with torn Pads that he removed and said he didn't have the time to repair it and I got it for $250.

I got the unit and indeed he took it all apart and had a plastic shopping bag with all the small loose parts along with all the screws. (I hope)

I was able to install a new HDMI and amazingly there weren't any torn pads to repair.

I put back together enough to test to see if HDMI will work and I don't have anything happen when I press the On button. No Beeps or Fan spin.

I checked the voltage at the power supply and it was 12v.

I checked all around the b side of the VSM-010 mobo and found the 12v rail.

I guess what I asking is that are there any other voltage rails on the b side of the VSM-010 board to check on the 5v or 3.3v? knowing that the 3.3v is needed for the Southbridge to start up.

or

Are all the other voltages are checked on the A side ?

The PS5 Pro is an Enigma right now as there isn't to much out there as its to new yet for repairs beside tear downs to do HDMI ports and cleanings.

Thank you for your time.

MJ Robinson