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I just had a couple of "shakers" this morning again with the computer and monitor plugged into the extension cord going to an outlet on the other side of the house. So it has happened now with three different outlets. I;m going to be getting an electrical person to look at this...since it is...

Monitor won't let me upnotch from 60Hz.

Good question. I got rid of the cordless phones last year. Only corded ob my desk.

I will be following up on all these good suggestions. Thanks again.

good suggestion... for the unenlightened, what is an RFI?

Just now got the screen shake with the extension cord plugged in to another outlet on other side of house...am wondering that since this dosesn't happen to my wife's computer, maybe there is some malware or trojan or something in my data that is causing the problem.....windows defender isn't...

Your detailed comments much appreciated Broe23...right now I have the computer/monitor on an extension cord plugged into outlet on other side of the house....if that works, than I believe the problem has to do with a subpanel located on south wall of house, and main panel is on the north...

I live in a single residence in the Los Angeles area...the issues you bring up are beyond my competence...this problem doesn't affect my wife's computer in another room, but apparently only in my home office...i could run an extension cord from my office to an outlet on the other side of the...

Spikes from a neighbor's electrical usage? I guess anything is possible. I have the computer and monitor plugged into a cyber power backup battery...with surge protector....so am unsure how it could be an electrical issue....just had another shaker for about 20 seconds while in Outlook and...

Alas....i"ve had two "shakers" today .... grrrrr.

Thanks for the suggestion...I had googled and regoogled the problem, and only yesterday found a reference to the possibility that speakers could be causing the problem...i have had the same old speakers (ungrounded) for many years....i unplugged the speakers and so far there has been no...

Thanks for your suggestion. Actually I am now using a Lenovo desktop computer for three months following the crash of my Acer laptop in November. The same thing is happening now with the desktop computer as was happening with the laptop. Crazy, random image shake...back and forth flashing the...

I'm trying to figure out why my monitor screen flickers, like it is having convulsions, from one window to another...it happens for about 5-30 seconds at a time randomly throughout my work day..and can occur when I am browsing, typing in outlook, or typing in word. I have switched monitors...