I picked up the CDTV at the local car boot sale along with a C64 ;-)
Right, unplugged everything internally apart from the PSU and LCD...we don't have lift off...
I double checked voltages from the PSU and all 'appears' fine there with a 12v input and a 0.2 volt input. There doesn't appear to any voltage from other wires - if this is based on the A500 - shouldn't there also be a +5v?
Then again, if im getting a 12v, I should be getting a 5v if it existed?
EDIT: Just had another idea, test the CDROM power input plug. The 12v is working okay, the +5v is only kicking out 0.2v...maybe this is my problem!
Time for a bit of PSU tinkering :-D