Quadra 605 - 5-Minute Wait for Startup Chime - Capacitor Issue?

[jasonfeinberg]

Hi all, recently acquired a Quadra 605, naturally it got banged up good in shipping. Replaced 3.6V, installed BlueSCSI (although original 160MB SCSI drive still works great), everything works as expected once it boots up - but that's the trick.

The issue is that it takes about 5 minutes from flipping the power switch on for anything to kick in. I flip it on and it's as if the machine is dead. About 5 minutes later, I get the chime, the fan spins, video kicks in, and the machine boots up. It then runs perfectly.

Anyone experience this before? In searching around it seems like most roads lead to issues with PSU / motherboard caps, does that sound like the most likely culprit?

And what is happening during those 5 minutes??

Thanks

 

[volvo242gt]

How new is that PRAM battery? Looks like an older Saft.

I assume you've tried the quick flip with the power switch trick, where you turn it on, then quickly cycle the power again?