Console will not power on (no red standby light)

I have a Fat 160GB PS3 (CECHP01). 99% of it's use is just for Netflix and yesterday it would not turn from the remote and I noticed that the red standby light was also not on.

The power cable is good, it's switched on, tried different outlets.

I opened up the console and confirmed that the AC power connector on the internal PSU is receiving power. the 4 pin connector on the EADP-260BB internal PSU is reading 5.5V, 0V, 0V, 5.5V. I'm unsure of which pins need to be jumped to power on the PSU independently of the rest of the console but it seems to at least be providing standby power. (UPDATE: I've swapped the PSU with a known working PS3 and confirmed that my PSU works normally, also my PS3 still will not power up and still does not show stand by mode with a known working PSU)

I've read elsewhere to check the ribbon cable to the touch button board but this model doesn't appear to have one and the buttons look to be integrated with the motherboard (though to be honest I didn't dive in much further than the PSU).

There is also a disc in the drive so any advice on how to get that out if I can't revive this console would be appreciated.