iMac black screen issue
So I purchased a 2010 Mac with a fried PSU it was black screening seconds after the boot logo came up. So now I replaced it with a new PSU and the black screening issue still happens but it takes longer to happen. I can use it for an hour or two but certain tasks make it wanna black screen but sometimes it doesn’t. Any help?
Is this a good question?
Let's run the onboard diagnostics. Restart your system press the D key. Let us know what happens and the error message/s
Reference: Mac startup key combinations
by Dan