External USB2 drive doesn't work on left USB port

Hi,
I have an 2,5" external usb hard drive which works on my right usb port, but not on my left one, when i try the disk on the left port, afterwards the usb port is dead untill restart, even my mighty mouse does'nt work on it. My logic board and board with audio and left usb port are already replaced, without result, also the cable beween logic board and daughter board...
The disk works on a colleage's macbook pro on both ports...
what to do?

Try resetting the PRAM:
http://docs.info.apple.com/article.html?artnum=2238
Make sure also that no USB devices are connected when you put the machine to sleep (close the lid, or start energy saver).
A restart will clear a hung USB port usually.

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One can't read the other.
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I have installed Windows 7 Ultimate 64 Bit on my MacBook Pro 13" Retina (Early 2013) and it's running fine. Boot Camp version: 5.0.5033.
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The install all went fine and Windows 7 booted up fine and so far, all hardware seems to be working as expected, with one exception. Things went sideways when I tried use it in "clamshell" mode - lid closed with external monitors and all my peripherals attached to a USB hub. I set up Boot Camp to boot into Windows and attempted to boot. It would give me the usual boot-up fanfair and a then a gray screen for a few seconds, and then it would reboot. It just rebooted over and over. I eventually discovered the issue was the USB hub - without the hub connected , it would boot just fine. Once it was booted into Windows, I could attach the the hub and everything would be recognized normally. Furthermore, I could put the system in sleep mode, wake it up and everything would be working fine. But it simply refuses to boot the USB hub attached. I've stumbled on a couple related threads - see https://discussions.apple.com/message/23802231#23802231. The suggestion is that only certain hubs to not work. I've got two different high quality powered hubs and both display the same behaviour. The other point is, that when booting into OS X with the same hub, it works perfectly. So it's a strange problem.
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<Edited by Host>

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First post on the forum.
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One can't read the other.
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oilgong wrote:
I can't afford to lose ANY of my files on my external hard drive and desperately needs a solution
It sounds like the drive may be failing. Do not attempt to do anything more with it .
If there is any chance of recovery at all your best bet is Prosoft Data Rescue II . There is a free trial to see if it can recover what you need. But don't do another process on that drive until you've downloaded and run it.
-mj

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It sounds like your hard drive is formatted NTFS, Mac's can read those type of drives, but unable to write to them without special software.
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Maverick,
Assuming that you're using the standard paths on your PB G4:
Just go to your user directory / Music: Copy the complete "iTunes" folder with all its content & all subfolder to your external disk.
On your G5 also go to your user directory / Music: Now replace the "iTunes" folder with the copy on your ext. disk.
Using this procedure all your playlists/playcounts ... will be migrated as well.
Wenn's komplizierter werden sollte, schick mir einfach eine private Mail an: [email protected]

External USB2 drive doesn't work on left USB port

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