Guest dono42 Posted December 21, 2021 Posted December 21, 2021 I have a 5,1 (original owner) that has been running fine for a long period of time. Most recent change was the addition of RocketU 1344D about 3 months ago. Recently it would boot intermittently, started maybe every other boot, reset with the power button, over time it became worse and then did not boot. Started by replacing the graphics card with the original ATI 5770, same result. Noticed outmp cpu a/b both flashed when the power cord was connected and removed. Diag button pressed show 5v... Read more Source: MacRumors
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