Good day, I would like to ask if a UPS is necessary for my problem. I currently use an AVR for my computer and there are times that there a clicking sound and my monitor shuts off but not the CPU. Both the CPU and Monitor is plugged in my AVR. I sometimes have a low voltage problem or any irregularities in electricity even though no major appliance is being used, and when I use the washer or AC I do not use the computer to avoid it. Is it harmful to the CPU parts and monitor if I keep using the AVR instead of investing in a UPS? I live in a town were our electricity isn't the best out there. Thank you.