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I've bought new monitor. I'm facing flickering issue when lights are gone and my ups switches on battery. I even replaced my cpu with a laptop, the issue is still there. The monitor I was using before was working properly. I want to know if the issue is with ups or my monitor.

Monitor: Acer et221q

https://www.amazon.in/gp/aw/d/B076PGBM25/ref=mp_s_a_1_4?ie=UTF8&qid=1579888320&sr=1-4&pi=AC_SX118_SY170_QL70&dpPl=1&dpID=51RL5R0FoFL&ref=plSrch

  • So it continues to flicker while on UPS? – Moab Feb 1 at 13:08
  • No, Its flicker or become black for 1 second or less and everything the fine there after, till again light is back and ups switches back. – Piyush Raj Feb 1 at 15:34
  • OK, Model of UPS? How old is it also. – Moab Feb 1 at 16:24
  • I bought it 6 months back. – Piyush Raj Feb 1 at 18:28
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    My guess is the UPS does not switch fast enough for the new monitor, only way to test is to use a name brand UPS to see if it does the same thing. I prefer APC brand. – Moab Feb 1 at 18:47
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The problem is with cheap hdmi cable, using a good quality amazonbasics cable solved the issue.

| improve this answer | |
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    Nice diagnosis! Never would have guessed the hdmi cable. – Moab Feb 4 at 16:14

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