Electricians/IT experts: Can you solve this mystery?
November 14, 2012 3:16 PM Subscribe
My computer cycles off without warning, and it's on a battery pack/surge protector UPS. What gives?
posted by Chris4d to computers & internet (13 answers total)
I am in the USA, in a regular two-story office building, on a regular 120V duplex outlet. On this outlet, there is a fluorescent lamp with a 13W ballast, and a UPS/surge protector (APC Back-UPS ES 500). On the UPS, I have a regular desktop PC and two regular 19" LCD monitors. About 0-5 times per week, without any warning or any precipitating factor that I can see (neither I nor my neighbor are bumping the table, the cables, the wall, anything), the UPS will beep and the computer and monitors will turn off, then back on. I lose whatever I had open on the PC; isn't this what a UPS is designed to prevent? Oh, and when this happens, the fluorescent light attached to the other outlet in the duplex is fine; no dim, no surge, nothing. Just carries on brightly.
I have switched out the UPS with another (same model), and it happened again. Then, I switched out the PC (old gateway for new dell), and it happened again. The only thing unchanged at this point is the monitors and the cables attached to them... and the wiring in the wall.
I am not an electrician, but we've called one to check out the building wiring. I'm also relocating desks. In the meantime, I'd appreciate any thoughts for other avenues of investigation. Thanks!