Okay so I pretty much tried everything I could think of- cleaned all connectors, stripped machine/cleaned RAM, every possible startup option, SMC/PRAM reset, CD start, etc. nothing changed.
Then I took it to a repair store they plugged in their modern HDMI display- perfect graphics, no problems!
SO... Last time I used this machine I was using an Al Cinema display A1081 with no problems at all. What has changed so it will no longer work? (same display is working fine with M1 mini) Any suggestions to get the system to see the display again?
TIA, D