Chosen Solution
So, I bought this MacPro 1,1 in a non working condition (the computer would start up, but there would be no output from the monitor, and the diag leds only showed me that there was trickle power and that the efi is loaded) I think it was cause of HDD as it didn’t have one. Anyways, this morning after leaving it off all night I go to turn it on and nothing. The power button wouldn’t do nothing and the machine seems dead, already tried an smc reset, tried everything I could. The room I left it in was rather cold so could that be a factor? Does anyone have any idea of why it’s doing this?
The #1 failure on the first generation MacPro is the video card. The #2 is the power supply. Your symptoms would lead me to believe you have a power supply issue.
