Okay. Now that I know how to open it, I'm in there!
Which one should I unplug first? Does that matter?
NO, but how are you doing that and still talking to us?......
Don't stick you hands in a machine that has power on it.....
NO, either one, but make damn sure you replace the pin connector exacty as you took it off. Do not get it backwards.
Nope...Does not matter Which one you do first.
Power off the machine and pull the power cable from the socket,,,,computers have capacitors that can hold an electrical charge for some period of time....so wait a minute or so before getting your hand into the innards... you ought to have an anti-static band to give a good grounding of any static electric your movement might have built up.... walking on carpet ....etc./...all of these instructions are precautionary...