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An Uninterruptible Power Supply (UPS) is an electrical device that provides backup power to critical equipment in the event of a power outage or other power-related issues.

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Why does my TV reboot constantly when running off of a UPS’ battery?

My LG CX/C1 (unsure of model) is plugged into an Uninterrupted Power Supply, it works fine while the UPS is plugged into power, but after input is cut, and battery power is used, the TV seems to reboot after 5 seconds of battery power. It turns on, picture appears for a split second, then turns off, and it keeps going like that until power to UPS is restored. The current UPS I have has a capacity of 3000 VA, and supports Buck&Boost AVR.

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@nabeelkamal sounds like your TV is power cycling do to a variation in voltage from your UPS. Most UPS should be capable of correcting minor power fluctuations (under-voltages and over voltages) some are not and it will depend on what voltages tolerances you have. TV's are a little bit more sensitive and will do exactly what you describe. You could try to build some filter capacitors and see if you can get to stop the variants from your UPS. Also measure the output voltages consistently with a good multimeter and see what voltages your UPS shows you.

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Hey there, I was hoping that wouldn’t be the issue due to the fact that my UPS is advertised as having AVR, yet it could be simply unegaged. It does however show the output/input voltage on its LCD screen, so that’s helpful. Thanks a lot for the help, I know where to look now.

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Bit of an update: it turns out that the Voltage Stabilizer I bought hasn’t fixed the issue still. Instead, I noticed that whether or not I connect my TV to it, it doesn’t make a difference. I’ve done some more testing, and it turns out that HDR is what causes the problem, I guess my UPS isn’t powerful enough to handle a display that bright (I think it’s 1000 nits when it’s on?) so by disabling it altogether the whole issue is gone. Interesting.

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@nabeelkamal that makes total sense. The higher quality your TV wants to produce the greater the power and frequency demands it will have. Thanks for letting us know and all the best of luck with your "power grid"

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