Small PSU troubles...

[ElectroBlaster]

I have a small psu board here that is designed to power one device ie: hard drive or cd-rom. It has one 4pin molex with a small fan wired into its harness.
I need some help as it is not totally dead yet.

Basically plug in the power cord (3pin iec kettle lead) and press the power button on the front, fan turns and cd-rom just ticks but will not do anything else. I have found that if you pull the power cord and randomly press the cdrom eject button it will try and fire up but only for that brief second or two, seems like that last surge is just enougth to make it live and then die as the power drains off.

Could this be capacitors at fault? There are 4 or 5 sat there, one big one and the rest medium to small sizes. They look ok on visual inspection but we all know this can be misleading. Everything on the power board looks good! no burnt marks, no damage, no funky smells etc.

I will get my arse in gear and upload some pictures