iMac600, This sounds to me like the power supply is the problem. When you take the CRT out of the work load, the "FLUP" sound was much faster, which tells me to check for proper …

I've owned.....5 ProDrive ELS's over the years, one of which was brand new (it was in our LCIII, which Dad bought brand new back in 1993). All of them are dead. I've also owned....…