Same thing happened again... upon powering up Mr. SDE today a horrible noise emanated from the Audio outs. Popped the case open and attempted the same fix as last time by re-seating the PROMS and connectors and in so doing found the cause to be a loose fitting connector on the Power Supply side of the 8 wire Ribbon Cable that spans over to the Motherboard. Carefully bending the pins just a little to create some friction against the connector contacts solved it, although a better solution would be to build a new Ribbon Cable with new and better fitting contacts. Also, cleaning the pins with electronic contact cleaner goes without saying..
Cheers
Teknik14
"...if it's round, it ain't Simmons."
Cheers
Teknik14
"...if it's round, it ain't Simmons."