Mac Pro trashcan doesn't start up

My Mac Pro trashcan does not start up. The back panel lights up for about 17 seconds, then goes dark again. I've tried it with three different monitors and two locations. Any advice? Thanks!

Mac Pro, macOS 10.14

Posted on Jun 10, 2020 11:36 AM

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5 replies

Jun 11, 2020 7:42 AM in response to llapel_KNOTT5

Modify that procedure to:

Unplug

press and hold the power button 5 seconds or more to eliminate any stored power

replug

wait five seconds or more

try to start

--------

The good news:

if you never seem to get the fans, it could be a problem with the PRAM backup battery, cheap.

The very bad news:

to replace the battery, a 31-step tear-down is required to get access to the battery holder.

Jun 11, 2020 6:18 AM in response to llapel_KNOTT5

does the internal fan come on?

do you get the chime?

Does the power indicator blink a diagnostic code (small number of blinks, repeats) ?

Jun 11, 2020 6:53 AM in response to llapel_KNOTT5

Try an SMC reset:

How to reset the SMC of your Mac - Apple Support

Any keys mentioned are called out by their position on the keyboard, not the label on the keys.

Jun 11, 2020 7:07 AM in response to Grant Bennet-Alder

I should have mentioned that I tried this yesterday and it didn't work. I just tried it again for kicks and no dice. (Since it's a desktop, I did the unplug/wait 15 sec/plug/wait 5 sec/power procedure.)

Jun 11, 2020 6:29 AM in response to Grant Bennet-Alder

No fan, no chime, no blinks. The back panel lights up for approximately 16 seconds, then goes dark again.

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Mac Pro trashcan doesn't start up