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deckard666

macrumors 65816
Original poster
Jan 16, 2007
1,293
1,324
Falmouth
Tried to start up my classic Mac Pro this morning and all I could hear was fan noise and there was no display on my monitor using my normal mini display port but funny enough I could access it using my parallels access app on my iPad and I could see It was all working fine…

my boot drive is an internal SSD so it can’t be that making the noise…

Tried restarting it a few times to no joy…

just started removing internal sled drives and lo its booted ….obviously a failed drive ? Lucky all backed up in carbon cloner….

although oddly it only boots if I remove the 2nd and third drives….ummm I’ll put them out and look at them plugged in externally I think …

Well I plugged some spare working drives into sled 2 and 3 and tried it - and it wouldn't boot and the fan noise kicked in again so presumably something to do with the drive controllers ?

v strange - you lot any ideas ?

I have a M1 MacBook Pro as well which I will start using "properly" soon as my main machine so I was going to sell this machine but wondering now if that might not be possible....
 
Last edited:
Perhaps a weak PSU.
Try also a minimal configuration: remove all unneeded drives and extension cards (PCIe, if present, except videocard), only wired keyboard and mouse. Start up and hold cmd+alt+p+r keys and let the machine start up three to four times, triggering a deep nvram-reset.

Do you have Windows installed? Avoid booting Windows in UEFI, it could brick your machine some day.
 
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