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Allanore
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Desktop graphics issue

I have a HP Compaq dx2300 Microtower PC that whenever a monitor is plugged in, it makes a flickering wave going across the screen. We switched out the monitor and plugs and it still makes a wave. I re-installed the graphics drivers. What other steps can I do to troubleshoot?
ComponentsDisplays / MonitorsPC

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nobus

8/22/2022 - Mon
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nobus

>>  that whenever a monitor is plugged in, it makes a flickering wave going across the screen.   <<   are you plugging screens with the system running?
it is not recommended to do so (but i do it also, and never had problems),  but it can be a kind of resyncing you see
are both monitors the same ?  try with different brand
also, try relocating the monitor - or pc  - to see if it depends on the environment
Callandor

A flickering wave on a screen may be a sign of improper grounding - try using a 3-into-2 prong adapter to eliminate the ground on the monitor or computer, or try a different outlet.
nobus

can you plse post the cause, or the fix?
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