Can anyone help me out to determine what's wrong with this APC Smart-UPS 3000VA (SUA3000RMI2U-NB)? I got it secondhand and tried following the described procedure to start it (charging battery before starting it). It actually worked for a few days but one morning it was only making this beeping sound and became unresponsive to button presses. I tried searching the web but could not found something similar (perhaps I was searching with incorrect key words).

Anyone that has an idea? Or can I consider this device to be broken and just try and sell the battery?

Update: posted this to the APC forum as well for those interested: [ Ссылка ]

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