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  1. #1

    Default re-enable usb ports

    My usb ports have been disabled because of too much power drawn through them. How can I enable them?

  2. #2

    Join Date
    Jan 2004
    Location
    Melbourne
    Posts
    6,927

    Default

    Welcome mspeeps,

    You might want to share what Mac it is you have, and what USB devices you plugged in before the fault. Do they plain refuse to work, or is it the software that is saying the USB ports are disabled?

    JB

  3. #3

    Default

    Thank you JB, I have a MacBook Pro OS-X. I left the laptop plugged into my HP printer overnight. When I turn on the computer it says that my ports are disabled because of too much power being drawn from them them. I've long since unplugged the printer, but still neither ports work.

  4. #4

    Join Date
    Sep 2009
    Location
    Mid-North Coast
    Posts
    701

    Default

    Have you tried turning it off and on again?


  5. #5

    Join Date
    Jan 2004
    Location
    Melbourne
    Posts
    6,927

    Default

    Hi mspeeps,

    thanks for the info. I'd first try resetting your PRAM - every Mac has a small battery inside that stores information such as this:

    Resetting your Mac's PRAM and NVRAM

    If this does nothing, the next step is to reset your Macbook's power management unit, this in case called an SMC reset:

    Intel-based Macs: Resetting the System Management Controller (SMC)

    Lastly, portable Macs don't provide much power at their USB ports as desktop machines do. Your best bet to stop this from occurring again would be to pickup a powered USB hub - go for a decent quality unit, as the cheaper ones don't do their job overly well.

    Good luck!

    JB

  6. #6

    Default

    Thanks, Tried that. Going to try the PRAM or NVRAM thing.

    ---------- Post added at 07:22 AM ---------- Previous post was at 07:21 AM ----------

    Thank YOu JB, I will try those & let you know.

  7. #7

    Join Date
    Jun 2006
    Location
    Adelaide, South Australia
    Posts
    1,234

    Default

    Traditionally i've found a power off and restart to resolve this. Used to have students in my class shorting out USB ports with staples resulting in a "USB Over Current Notice". Hard restart always fixed it.

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