Alpine MRV 1507 won't power up

My alpine MRV1507 won't power up at all, no lights..

I have inspected visually both circuit boards and they seem to be in good condition.

on bench test the caps charge, I have followed the 12v some what in to the main first board but until I know what i'm looking for I don't want to go any further.

I love old skool audio and I would love to get this baby working again, it is in very good condition.

Your help would be much appreciated
Thanks
From England:)