Replacing fan: new thermal paste?I have bought a new fan and heatsink for iFixit for my original MacBook Air. When I lifted the heatsink, part of the thermal ...
Keeps rebooting during cold startWhenever I start the iMac in the morning, I hear the startup sound, but then, at different stages of the boot process, the sc...
Answer to: No power on USB port.The hatch is prone to failure. In my case it was the digital lines of the video port - analog VGA worked fine. I think you should try replacing the hatch.
Answer to: Green lines display in video and freezes frequently.I had this problem for a long time. In general smcFanControl software helps. It let's you speed up the fans to a point when the GPU is no longer overheating and the artifacts and freezes no longer happen.