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  1. J

    Mac Pro 3.1 power issues

    thanks for the link. i will follow the troubleshooting guide later. At the moment i am running the AHT software and it does not report any faults apart from a rear exhaust fan failure ( it is not plugged in at the moment ). I am currently running prime 95 on a win 10 OS install carrying out...
  2. J

    Mac Pro 3.1 power issues

    thanks for the reply. Not to start with as i wanted to test the old psu from the dead mac pro 3.1. but after issues i have gone back to the working psu. still the same problem. power light always on and no post with cmos battery in. I have tried 2 cmos batteries and tested them with multimeter...
  3. J

    Mac Pro 3.1 power issues

    Hi I have moved my mac pro 3.1 motherboard from a badly damaged case to another case. The power light is permanently on and the machine fails to power up. i have taken the cmos battery out and tried a different cmos battery but still no change. I can now get the machine to power up by plugging...
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