Mid 2010 Mac Pro 5,1 chimes repeatedly, no video
Was sitting in front of it last night when the screen went dark and it began chiming repeatedly. No video signal. No response to any of the startup key combinations. No boot menu. Behavior is identical with all disks removed, so pretty certain it’s not even looking for an OS. Removed CPU tray, RAM, Radeon card, drives (including optical drive cage), spray-dusted the heck out of everything, reassembled everything, no change. I don’t see any angry red LEDs illuminated, although the red LED on the CPU tray does blink once shortly after the computer is switched on. All fans appear to be working, including on the Radeon......
Darn. :(
Thoughts on what died?