Blown DJM 800 PSU (I think)

Hi today I made a very silly mistake and replaced a channel fader on my DJM 800 while the power was still on... now i cant even turn on my mixer. I took apart the mixer and replaced the fuse with a new one of the same amp and voltage rating but it still wont switch on. Would the problem be that I have blown the power supply? If so are replacement power supply still available for the DJM 800? I live in the UK, what would be the best thing I could do to try and fix the problem?