if you have an issue with something powered by electricity, why do you need to count till 5/10 when you unplug/turn off power before restarting it?
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Most of the household items that you use that plug in don’t run off of Alternating Current directly, it has to go through what’s called a rectifier to turn it to direct current. This involves capacitors that take on a charge and hold it at a certain level…and will maintain that charge for some time even after being unplugged.
The thing is, 5 seconds isn’t often enough to discharge, so here’s a tip : If it has a power button, after unplugging, press and hold the power button for 10 seconds. That will drain the caps.
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