Alternately, if that doesn't work and you've given up hope of anything else, you could try cutting the ports off the motherboard, though that runs a pretty good risk of breaking it completely. If it's clean and still doing it, see if you can maybe see the spot it's corroded and if you can scrape the corrosion off without breaking anything, to remove the short. If so, clean, put it back together and try again. If that doesn't help, take the computer apart (which will be a challenge, but hey, it doesn't work anyway) and see if there's anything gross inside to be cleaned off. You might try getting some Q-tips and isopropyl alcohol (ironic, I know) and cleaning the inside of the ports thoroughly (while the computer is off and powered down). stuff stuck in the port that's shorting it out, or the port itself got corroded and is shorting out internally. Well, powers927, that's the second-worst cause of hardware failure I've heard of. If you keep getting the error, but this time the keyboard goes out, then it's a bad port with a loose wire internally or something. Oh, if both are directly connected, one other thing you can try is swapping which ports they're plugged into if you keep getting the error and it's still the mouse that goes out, then it's probably a bad mouse. If it still happens when directly connected, I have to think that there's a hardware problem with either the port or the mouse. I wasn't quite clear if the mouse and keyboard are plugged into separate USB ports, or if the mouse is plugged into the keyboard if it's the latter, you might try plugging the mouse directly into the computer. Not sure that's what it is, though-if it's just a very poor connection and the power is right at the limit of what it can handle, then when you jiggle it it might be disconnecting and reconnecting, thereby resetting the error until it edges over the line again. If jiggling the connector fixes it, that sounds rather like there's a bad wire in the cable, and it's shorting, causing the "too much power" warning.
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