|I wonder how many people know about the "residual power" thing? I was suprised the first time I heard about, but it really exists.|
In many cases when you shut down a PC, especially a tower, there is still some power hanging around in the PS capacitors. If you remove the power cord and press the power button, you'll often get a flash of the lights and a quick spin of the fan.
I used to work on high voltage equipment (15 KV-DC) and we knew that we should always manually ground the big oil filled capacitors even though the panels on the cases had automatic grounding safety switches that engaged when the panels were removed.
Even though we were the ones that maintained the transmitters and always made sure the grounding system was working, we still manually grounded the big capacitors before we reached into the transmitters. That's because we knew what could happen if the automatic system failed.
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