Everything is up to date so I know it's hardware related. All ports are claimed except for my right USB port on my keyboard which I use to sync and power my iPhone. Another port in the back of my iMac is for my Logitech MX1000 mouse and the third for my keyboard. My TM backup drive takes up a USB port behind the iMac and my left keyboard port for power. My 1TB media drive uses my FW800 port and is powered via its own AC plug so that is no problem. I keep getting this message at least once a day now. You could, alternately, try removing the USB-related kext files from the OS and see if that kills the error messages, though if there's still a short it might overheat or cause other damage eventually (assuming the ports continue supplying power even when disabled, which they may not).Ī Google search should lead you to what kexts are necessary, and you can use for the physical takeapart instructions. 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. The theory that this condition would repeatedly damage logic boards should probably be considered with a healthy dose of skepticism.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. USB ports are well protected against over-current conditions - that's why they shut down & generate the warning. If you connect them one at a time until its battery is charged up enough not to ask for extra power, the warning may no longer occur & overall charge times may improve.īTW, it is extremely unlikely that anything will be damaged by this. I suspect that there is actually nothing wrong with any of your Apple products & that this appears to be happening suddenly because more than one of the peripheral device's battery is discharged enough that each is requesting extra power at the same time. Powering Apple and third party peripherals through USB for more about this special feature.) This allows for faster charging from Macs that support this feature, but support is also dependent on which device is plugged in first. ![]() Any suggestions?Įach of these devices may request more power from a USB port than the USB specs normally allow. We can no longer charge, update or manage these devices through our computer. This happens when my wife or I plug in our iPhones, iPods or her iPad.
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