assuming (i know that's a dangerous practice) the case/motherboard/power supply are all properly designed, the grounding will be builtin such that you really don't have to worry about it, but here are some things to look for:
the power supply will have a black wire as part of its wiring harness for each connector; this will be the grounding lead that keeps the power "common" with the surrounding metal so those "flashes" are dissipated before they can do damage. about the only things you can check on the motherboard are that the mounting screws are tight/snug, and that all cards/connectors are firmly seated. the case is basically the same as the motherboard in this particular scenario, in that the only things to check are the tightness of the mounting hardware and any connectors to indicator lights/usb/firewire/com/lp/etc plugs. On Apr 6, 2005 7:06 AM, Philippe Landau <[EMAIL PROTECTED]> wrote: > Joe Mecklin wrote: > > from your description it would appear you have a grounding problem > > with your pc, or a defective hard drive. the electric flash as you > > plug it in (before the system can recognize/initialize it) should not > > be a control signal per se, but rather is likely extraneous current > > that improper grounding is letting reach circuitry it shouldn't. > that is possible. > do you connect the case of your PC to the power unit ? > could the grounding problem be on the side of the harddisk enclosure ? > i really don't understand these simple electrical issues. > > kind regards philippe > > -- > > > On Apr 6, 2005 6:23 AM, Philippe Landau <[EMAIL PROTECTED]> wrote: > > > >>when i plug in my new Data-Tec D350U USB 2 external harddisk, > >>i see a small electric flash which can cause > >>my PC to shutdown instantly. > >>i know USB is powered, carrying a small voltage, > >>so the flash is not unexpected. > >>also as it is used to send control signals > >>i can understand that it powers down my PC. > >>but it is risky for my data, > >>so i would like to know if others saw that happen too. > > > ____________________________________________________ > Want to buy your Pack or Services from MandrakeSoft? > Go to http://www.mandrakestore.com > Join the Club : http://www.mandrakeclub.com > ____________________________________________________ > > >
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