Mac pro test power supply

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Mac Pro power button and/or power supply problem - Ars Technica OpenForum

Thread Tools Show Printable Version. Join Date Sep Posts 2. Help with Mac pro Power supply my computer is a Mac pro early 8 core, right now have a startup failure, the power-on led does not illuminate, no video, only works for 5 seconds an then shut off.

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I check the diagnostic led but the 8 led power do not illuminate only works led number 2,7,9. First thing to try - reset the SMU.

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It controls all startup and power off functions on your computer. The first generation model includes the machines from through For the past 4 months my Mac Pro 1,1 quad 2. I replaced the ram using the specific fully buffered ram, in a pair etc. Blew out all the dust from fans and power supply with a blower.

Mac Pro power button and/or power supply problem

With everything that i have read i think it has something to do with the power supply. If it is the power supply is there just a fuse blown that i can replace? Also if i put my ear right u against the power supply when its plugged in i can hear a very very faint ticking sound, similar to perhaps the sounds ignition sparks make on a gas stove. I plan the replace the psu and am worried about needing to use the original system disc, which I have, and I have the existing system backed-up, but what a.

Test ATX power supply

I have got macpro a 8core 2. On my Mac Pro no led at the on button. An audible click then another click.

Mac Pro power supply testing

I did the drill left it up plugged, replaced the battery with fresh one; still the same clicks when turning on. The top 'cuda' button shows the 5vdc trickle but never turns on. I am gambling the power supply has gone south. It's possible the mobo has a failure but nothing visual like pregnant caps or burn marks. If the grease drie out on the cpu's I think it woul boot up then crash because of heat. I've removed the power supply, it's sure is dusty but does not have a burnt smell.

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Let us know if you get any changes, also look at the diagnostic LEDs and tell us what you observe. At this point I would make sure there is power to the wall plug, next replace the power cord, next replace the power supply.

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  4. Note you will need the original system disk to sync the fans after your power supply is repaired or replaced. Muhammad Shehzad. I had the same problem with my MAC machine and tried the all above troubleshooting but no vain, I replaced the PS but problem was same,. Unplug the power switch cable tried to turn the system and plug back the power cable again.

    Actual problem found in power switch, its dont pull back properly and switch connectivity force the machine to shutdown. Replace it with new one if your power switch hv repeated issues. Select a Language: Help Translate iFixit. Back Answers Index.