When changing cables or doing other things to MB, pull the PSU cord, or will just using the PSU OFF switch work just as well?

classguy

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Nov 28, 2012
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The manuals usually say to pull the PSU's power cable before making any changes. Is that really necessary or will just shutting off the PSU be just as effective.

Is pulling the plug supposed to make the process idiot proof or maybe protect against the rare defective 0/1 switch?

When the PSU switch is on, the ASUS X99-A II has various LED lights on, including it's RGB lighting, and the RJ45 network jack blinks showing activity, all of which very clearly indicates you're on standby power or a soft power off. VERY cool idea too.

So with that board, there's NO possibility of accidentally doing something thinking it's in hard power off when it's actually on standby. Does that mean it's safe to just switch the PSU off when switching cables or putting in PCI-e cards and such?

Or maybe, switch off the PSU, then press the MB Power button to drain every last volt and then proceed?
 
Solution
I think you will get different answers depending on who you speak to, I personally turn off/unplug the psu at the wall and have never had any adverse problems with any equipment.

my worst experience was on the old PC/AT cases with the hard power switches, I was very young, around 10-11 and wasnt sure what i was doing, putting the pc back together while switched on and running, i touched the back of the power switch whilst putting the front pannel back on and got a horrible shock.

bobmanuk

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Jan 18, 2014
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I think you will get different answers depending on who you speak to, I personally turn off/unplug the psu at the wall and have never had any adverse problems with any equipment.

my worst experience was on the old PC/AT cases with the hard power switches, I was very young, around 10-11 and wasnt sure what i was doing, putting the pc back together while switched on and running, i touched the back of the power switch whilst putting the front pannel back on and got a horrible shock.
 
Solution

classguy

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I've started adding one more thing: After powering off and unplugging the PSU, I hold down the power button for about 5 seconds. That should kill off any last smidge of juice that might be lurking in capacitors. I think. LOL.