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An interesting anecdote for EMI display issues
Posted: 15 Sep 2021, 19:48
by lizardpeter
Lightning struck near my house yesterday but did not actually affect any of my electronics (to my knowledge) other than my monitor. The lights never dimmed or flickered, so I don't think the power itself was affected in any way. I was playing an intensive game and my PC didn't crash, so I don't think the actual power delivery was an issue. I think that the EMI from the lightning caused my monitor to turn on and off. I just thought it was an interesting observation and an example of how EMI could be causing some of people's electronics problems. As I have heard others say, the EMI could cause errors that are corrected instead of directly causing a crash, resulting in extra processing lag to correct these errors.
Re: An interesting anecdote for EMI display issues
Posted: 16 Sep 2021, 08:18
by Mugabi
water is wet
Re: An interesting anecdote for EMI display issues
Posted: 16 Sep 2021, 12:48
by Chief Blur Buster
Mugabi wrote: ā16 Sep 2021, 08:18
water is wet
Enough trolling.
lizardpeter wrote: ā15 Sep 2021, 19:48
I think that the EMI from the lightning caused my monitor to turn on and off
One of my monitors (not all of them) blanks out every time I turn on a certain 12 volt lamp near the computer monitor -- the power supply in the 12 volt desk lamp emits a mini-EMP of interference. A tiny cherry bomb worth of EMP pulse, if you will -- only when it was flicked on and power surged through the lamp's transformer/supply. The monitor recovers after 3-4 seconds (as if the monitor automatically rebooted).
Basically a mini version of the LG 5K display problem with WiFi routers --
https://9to5mac.com/2017/02/03/lg-fixes ... naffected/
I can imagine how some weaker computer components (near-borderline warranty or cheaply made) would react to such an EMI-prone desk lamp sitting next to the unprotected glass window. Who knows?
Moral of the story -- keep electronics apart as much as you can. The inverse square law is your best friend. Falls off very well with a meter of distance.
Re: An interesting anecdote for EMI display issues
Posted: 16 Sep 2021, 16:21
by Bobo
my monitor screen goes black and then back to normal everytime i turn on my speakers.
Re: An interesting anecdote for EMI display issues
Posted: 16 Sep 2021, 21:59
by lizardpeter
That's really interesting. I really wish there was a way to easily see how much error correction is occurring in modern PCs. I personally don't suffer from any known input lag problems, but I really like reading this stuff and researching it.
I had to stop using Astro A50 wireless headsets years ago. I went through three pairs of them, and all of them had the same issue. There was intermittent crackling and audio drops over wireless. I think it had everything to do with operating at 5 GHz and the interference with other devices and the access point itself. I know the new wireless tech in many mice is supposed to be great, and I don't really doubt that it is, but I find myself sticking with wired whenever I can because of my own bad experiences with wireless.