what do you meen power control ng monitor? do you mean yung hardware controls ng monitor yung may button sa mismong monitor or yung software control like when will it be turn off pag idle?
why the text speach? ano yan monitor NA/NO flickering? if ur asking kung anong resolution sya hindi mag fiflicker you can try yung default na sinasuggest si windows which is labeled recommended pero usually flickering has to do with the frequency and not the resolution. pag hindi kasi kaya ng monitor mo yung resolution you`ve set it to, it will not display anything and that is why you need to confirm before permanently applying the resolution kasi pag hindi mo nakita yung display and you did not confirm the change youve set then it will revert into the previous resolution. by default regular monitors use 59-60 Hrz, higher refresh rate monitors have higher frequency pero kung hindi frequency ang problem it might be the hardware yung problem.