PC won't turn on after shut down.

[BillP]

Hi,

I have a problem with my APC BACK-UPS 650VA, every morning we have to replace the power cord of the PC going to the UPS for the PC to turn on because the pc won't turn on using the same power cord after shutting down the computer and turning off the UPS. to add, the power cable is not damaged or defective, we use the same power cables everytime it won't turn on.

your feedback is highly appreciated.

Regards,

Carlo Joseph O. Alejandro

[Anonymous user · Accepted solution]

I can't say for sure, but I wonder if this might be an odd incompatibility with your power supply. Certain power supplies with active power factor correction don't properly handle the switch from a true sine wave (as your electrical utility delivers) to a stepped square wave (as the UPS puts out).