Our Mac Pro 2013 is in a weird state where it had been shut down over night, when we have gone to power it up again, the lights (on the back) come on like it’s doing something, the lights stay on for about 15 secs then fade down. The computer makes no chime, and doesn’t (seem to) do anything following this.
Any ideas, help, assistance appreciated.
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This sounds like a power supply issue. Are you able to test your power supply (DVM)?
Some things I strongly recommend is making sure the AC outlet is properly wired & grounded as well as using a surge suppressor or better yet a good UPS. Often times surges can weaken or kill a systems power supply. It makes no difference what the system is, computers are just sensitive!
You’ll want to gain access to the power bus bars as you can see in Step 20 in this guide Mac Pro Late 2013 Power Supply Replacement. Follow the first steps stopping at Step 8 so you can then remove the shield. Then reconnect the fan unit making sure you don’t stress the connections (very easy to damage) using the DVM measure the voltage across the two sets of screws make sure you son’t short the contacts! What is the voltage you’re measuring?
To be clear here this is not easy to do by your self! Using a second set of hands makes this much easier.
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Hello try this
unplug everything and the power cord then hold down the power button for 30 seconds and plug the power cord only and try it on a diffrent outlet in the house then press the power button on see if the lights to the same or stay solid.
из XTerminal
thanks. result is same behaviour
из Paul