My USB ports are disabled.

My USB ports are disabled. When plugging into the usb ports, a popup window says it has been disabled because a device is using too much power. I've tried resetting the SMU, PRAM, disconnected the battery for 10 minutes. Nothing works. The only other advice I've read is that the logic board may need to be replaced.
Asked by: Guest \| Views: 208

Total answers/comments: 6

Comments display order:

bert [Entry]

"Hello Ben....as u see below, there are two different SMC resets. It depends on wether u have a removable battery or not.

Reset the SMC of a MacBook or MacBook Pro’s with detachable batteries:

Shutdown the MacBook/Pro and remove the batteryDisconnect the power adapter, hold the Power Key for 10 secondsRelease the power key and reconnect your battery and power adapterTurn your Mac onLet boot as usual.

Reset SMC of a MacBook or MacBook Pro’s with an internal battery:

Shutdown your MacBook/ProConnect the power adapter to your MacOn the MacBook/Pro’s keyboard, hold down the Shift+Control+Option keys and the Power button at the same timeRelease all keys and the power button at the same timeBoot your Mac as usual

Make sure that you are performing the correct SMC for your machine. If this doesn't work; I would create a new user account and see if the problem persists, before jumping into a repair. If this doesn't help; you might need to replace the I/O Board of your machine."

bert [Entry]

"Hey everyone,

I tried resetting SMC as well both ways and still nothing.

Odd thing is that my usb ports work for everything EXCEPT my “Focusrite Scarlett” interface for recording music in logic.

Anybody else have this similar problem??"

bert [Entry]

Different ports have different power levels. Try the other ports

bert [Entry]

Thank you all. I tried all of the above and still could not get the USB port to recognize any device. The original device that fried the port was an RC helicopter that came with a USB charging cord. When plugging in an external hard drive or a usb flash drive or other usb devices the device itself will show a light to show that there is power, but the Finder and/or desktop will not recognize the device so I can't click or use the finder to open or move it. Anyone have amy more ideas before I have to plunk down a few hundred dollars for a new logic board you think? I assume this is the same as the I/O board that was mentioned in the previous comment.

bert [Entry]

My mouse has been working for ages and suddenly my mac does the same thing i tried different mouses none of them works and pops up "unplug the accessory using too much power to re-enable usb devices" whats happening!

bert [Entry]

Hello BEN... i have exactly the same problem ... i try a lot of things and nothing works, please let me knows if you fix this and how... thanks in advance