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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

Macbook pro usb not working


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Sye

 
Member Since: Apr 07, 2013
Posts: 3
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I hope someone can help. I plugged a usb hard drive into my macbook pro and the laptop restarted and now the usb ports wont recognise anything or charge anything. The same thing happened in a
Pc but the usb ports still work on that and if i plug it into a imac it just says that the device is drawing too much power.

Is there anyway to fix this or am i screwed!

Its a macbook pro 8.1

Any help would be appreciated.
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harryb2448

 
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Mac Specs: iMac i5 2.7GHz OS X.9.4 and OS X.10

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G'day and welcome to the forums.

Is the external hard drive mains powered? If not that may be the problem simply too much power required. If you are using OS X.6.8, your post does not say, try Repair Permissions in Disk utility and if no joy boot from the DVD and run Repair Disk.

If OS X.7 or OS X.8 try Repair Permissions and if no joy boot into Command + R and do the Repair Disk from there. Keep us posted?

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!
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Sye

 
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thanks for the reply, its 10.8.3 and the USB was powered but now nothing works through the USB ports.

ill try booting from disc and see if that helps,

one other thing ive noticed, when i reboot and login i hear 2 error beeps, im assuming 1 for each USB port.
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harryb2448

 
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Two beeps indicates a RAM problem. For starters try re-seating the modules. New memory added lately? Keep us posted?

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!
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Sye

 
Member Since: Apr 07, 2013
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Quote:
Originally Posted by harryb2448 View Post
Two beeps indicates a RAM problem. For starters try re-seating the modules. New memory added lately? Keep us posted?
hi thanks for the info, ive reseated the ram and put the old ones back in (i changed them to 8gb about 10 mins after getting this laptop 14 months ago).

it only beeps once now though...

im gonna try a repair disc, ill let you know how it goes.
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harryb2448

 
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By beep once I trust you mean the normal chime? Fingers crossed Sye.

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!
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