What to do if my CyberPower PFC Sinewave UPS will not turn on?
- RRegina TranJul 28, 2025
There are several reasons why your CyberPower UPS might not be turning on. First, the on/off switch might be preventing damage from rapid cycling; turn the UPS off, wait 10 seconds, and then turn it back on. Also, ensure the UPS is connected to a working 110/120V 60Hz outlet. The USB cable might be disconnected, so connect the USB/serial cable to the UPS unit and an open USB/serial port on the back of the computer, using the cable that came with the unit. If these steps don't work, the battery may be worn out or there may be a mechanical problem.