On Mon, 2006-10-23 at 20:52 -0500, Rajko M wrote:
On Monday 23 October 2006 17:48, Carlos E. R. wrote:
The Monday 2006-10-23 at 17:02 -0500, Stan Glasoe wrote:
All warnings about static electricity and grounding apply and only attempt this with power the cord removed: Fully removing and reseating cards, cable connections, etc can usually resolve a whole lot of problems.
Other people recommend leaving the cord connected, with the switch in the off position: this way the earth wire remains connected.
-- Cheers, Carlos E. R.
The magic that burns electrostatic sensitive parts is amount of electrostatic charge that will go trough the part driven by potential (voltage) difference between human body and the part. Not every static is damaging, but in the winter our skin is dry enough to load quite a bit.
Attached ground to the chassis will not help if operator forget to use antistatic strap attached to the metal part of the case, but then the for the safety reasons cord must be unplugged from the wall outlet, because you are accessing malfunctioning device where you have no idea what is wrong. That means you have to find a ground that is for sure ground, and not "it should be ground", because "it could be line voltage" as well.
Second reason not to use this method is construction of todays computers, where "switch" is just a signal key that tells motherboard to turn power supply on. So there is no real separation of electric power (110 VAC) like it
230 V~ 50Hz Where do they have 110 V~ ???
was some 10 years ago. Thanks to Stan to remind us on this.
Groundign everything and using antistatic straps is valid in industry where worker/operator has to touch many objects and in the same time has to focus on job, not on ESD (ElectroStatic Discharge) problems.
On a single device it will work without straps, but with unplugged power cord, as long as repairer has in mind that discharging is not one time process, but it has to be done after each contact with something outside the computer case.
Did I mentioned, that disconnected cord helps a lot against bad luck. I'm not that superstitious, but by now it helped better than a rabbit foot.
-- Regards, Rajko M.
-- /Peo -- Registered Linux User #432116, get counted at http://counter.li.org -- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com