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Interesting Computer Problem--Smart Phone Static Shock

Posted: Wed Nov 23, 2016 5:45 pm
by Mynock
Came home, plugged phone into USB on tower.

Grabbed food, came back, PC is non-responsive. Hard reboot.

Posts, but comes up with the message "Keyboard Error No Keyboard Present". Weird.......

Check plug, power off/on again, same error.

Try another USB port, power on/off again, same error.

Try two other keyboards that I know are functional in EVERY USB port on the machine......same error.

At this point I'm at a loss because I can't do anything to troubleshoot the machine, because, press delete to go into bios. :roll: Called our IT guy at work, first thing he asks me was if I plugged my phone in. Yup, I did. Told me to Power off then turn off the PSU to do a full BIOS reset. Powered back on, machine back to normal. :D

Static discharge when plugging the phone in. Does different things to different machines, apparently mine's reaction is to clench all it's USB ports tighther than a dolphins butthole and refuse to respond until fully reset. :lol:

Re: Interesting Computer Problem--Smart Phone Static Shock

Posted: Wed Nov 23, 2016 6:26 pm
by kham
Huh
Well, it's at least operational after a restart. It must be a sort of "save-me-from-stray-voltages-by-curling-into-a-ball" mode :D
Never seen that happen yet. You'd think smartphones would have the interface set up to shield static discharges, since they get unplugged and plugged several times a day - minimum.

At least it didn't try to self-immolate :lol:

Re: Interesting Computer Problem--Smart Phone Static Shock

Posted: Wed Nov 23, 2016 6:31 pm
by Mynock
Yea I just put a $400 video card in the thing like 3 months ago, I'm really happy I didn't fry that. :D

Apparently this is common knowledge among IT guys but I had never heard of it. Had the machine 6 years now been through 3 phones and it never happened before.

Re: Interesting Computer Problem--Smart Phone Static Shock

Posted: Wed Nov 23, 2016 6:51 pm
by kham
I've always been aware , of the thing, in the back of your mind really since it never has became an issue

What with a half-dozen cameras of multiple types, portable drives, readers, smartphone, dashcam (new) it's not like there are few opportunities for static discharge *somewhere. The technology is supposed to be idiot proof after all. And being the average user, sure :D Let's be honest, none of our desks would pass muster in a clean room. Or even white glove silliness :P

Re: Interesting Computer Problem--Smart Phone Static Shock

Posted: Wed Nov 23, 2016 9:44 pm
by dlodoski
Mynock wrote:Yea I just put a $400 video card in the thing like 3 months ago, I'm really happy I didn't fry that. :D

Apparently this is common knowledge among IT guys but I had never heard of it. Had the machine 6 years now been through 3 phones and it never happened before.

I would momentarily plug the phone into a 'wall' charger to discharge it on low humidity days. Or any time you have your phone jostling around in your pants or coat pocket.

The charger won't provide a true path to ground, but there would be enough electrical mass there to draw off the static buildup.

Re: Interesting Computer Problem--Smart Phone Static Shock

Posted: Thu Nov 24, 2016 12:41 pm
by Mynock
That's exactly what I was doing, taking it right out of the pocket and plugging it in. I think I'm just going to use the wall charger exclusively now unless I have a reason to plug the phone in and upload pictures or something.