I have one of those grey box UPS that is supposed to take over in case of a power outage, connected to the VCR in the lving room. Recently, I replaced the batteries due to problems when the power went out. (The UPS did not keep power top the VCR.)
Since then, I've noticd a peculiarity which I don't fully understand.
If I shut off the circuit at the breaker panel which also feeds the UPS & VCR, the resultant power outage - even if less than 15 minutes, and with nothing being recordrd on the VCR - invariably leads to all power being removed from the VCR, and the clock as well as all programming all go to Electron Pergatory.
But if there is a power outage, lasting about the same time, the UPS does lick in and saves the clock and will continue to record whatever is being taped by the UPS.
As the Ancient Chinese Detective Harry Hoo used to say: "Two Possibilities." Either my UPS wants to see the power drop off in a semi-relaxed slope, and the abrupt slope of the panel breaker opening is just too fast for the thing to respond; or is there another explanation?
HR.