I recently (2 days ago) had the same problem but win an amiga 1200.. I bought a new ppc and the same happend .. I realised that its a connector problem try to get a contact cleaner spray WITHOUT OIL and check and if you can re-stretch the pins of your proccessor slot . Now its working again but it is very unstable in card moving into the slot. I'm even try to fire it up with my old ppc card that I thought it was defective. Amigas has started to getting old.... its not to behave them like before or like a PC.. we must be gentle and leave them as they work.
