I'm having a problem with my ASUS p8z77-v motherboard. The USB 3.0 port right next to the ps/2 port is cutting in and out. I wanted to plug my mouse into it, but every half hour or so the port turns off for about 10 seconds, making it useless. I have a keyboard plugged into the neighboring one, if that matters.
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Sounds like there could be something loose in there so maybe you could check it out and see, if there is then it could be sent back for repair.