I'm using an Intex Protector UPS. When I push the power button it starts with a beep, which is normal, I know. But when the beep ends, the light which shows power turns off and button remains pressed. After 1-2 seconds, it beeps again. This keeps repeating every few seconds.
I thought it may be because it needs to be charged, so I left my ups with AC 220V for 9 hours. That did not help; it still keeps beeping. What might be the cause of this issue?
FWIW, I always push button to turn on UPS but the problem is I'm observing it from today. It was fine yesterday. I bought my UPS just 3-4 months before.