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Hardware / Re: AcBel PSU / Quicksilver
« Last post by aBc on Today at 01:44:53 AM »You may have a dead mainboard / motherboard...it's a possibility.Interesting video.
Have a look at this YT vid, similar symptoms and Nick found the issue was the mainboard.
https://youtu.be/vAi-L6KWwZs?si=xhVaLR-qMScBJQU2
And after watching through it a few times I’m uncertain as to whether or not he actually replaced the original mobo with a different one in the end - OR if he actually put the original mobo back in, making certain to properly seat all of the mounting screws? (Especially that one screw that was not Apple original.) And that one in particular is important screw for the CPU daughtercard circuit. No stable, solid connection there? Then no power up. So yes, definitely DO check ALL mounting screws and Molex connectors. No complete circuit power through the CPU = no boot and shut down.
Also… not a CUDA button. But instead… a PMU reset button. They are different and PMU needs only a fraction of a second to be depressed for a reset. I often confuse this terminology too, coming from older Macs with a CUDA button.
AND no new heatsink paste applied, nor any anti-static procedures followed?