Can you tell me how to get my Back-UPS ES 550 to stop its screech? It is a model # BE550R. I suspect there was a power outage. The "Replace battery" light is not on so I assume it is fine. I have a simple paper shredder plugged into the surge protector and it works, but I am afraid to plug my computer in, in case it has some electronic problem. I have tried unplugging the unit and also hitting the Reset button, but still a shrill continuous sound.
Try the reset procedure and after that if the unit still makes the noise it should be replaced.
1: Disconnect any attached load.
2: Unplug the UPS from the wall socket.
3: Disconnect the UPS' internal battery.
4: Push and hold the "On" button on the UPS for 5 seconds
5: Reconnect internal battery.
6: Plug UPS in to known good power source.
7: Turn UPS on.
Thank you, but how do i disconnect the battery? I got it out, but there is a black wire & a red wire. Which do I disconnect & how?
This video shows you how to disconnect and reconnect the battery
Choose a location