Mac Pro USB port problem

The front USB ports on my 2010 Mac Pro aren't working. Every time I boot the Mac, I get a message window - twice - saying they were drawing too much power, and have been switched off, even though they're empty.
I've tried resetting the PRAM, powering off and unplugging everything and removing the battery from the logic board. Nothing has worked. The two front-facing FireWire ports are working, but the USB ports just won't come alive. Does anyone have any further ideas?

I would run the Apple Hardware Test:
Checking for a Hardware Problem
If you suspect a hardware problem, use the Apple Hardware Test application to help
determine if there’s a problem with one of the Mac Pro components.
To use Apple Hardware Test:
1. Disconnect all external devices from your Mac Pro, except the display, keyboard,
and mouse.
If you have an Ethernet cable connected, disconnect it.
2. Restart your Mac Pro while holding down the D key.
3. When the Apple Hardware Test chooser screen appears, select the language you
want to use.
4. Press the Return key or click the right arrow button.
5. When the Apple Hardware Test main screen appears (after about 45 seconds), follow
the onscreen instructions.
6. If Apple Hardware Test detects a problem, it displays an error code. Make a note of the
error code before pursuing support options. If Apple Hardware Test doesn’t detect a
hardware failure, the problem may be software related.
You may also consider replacing the front panel board.

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    4) As I've shown, each controller card seems to be unique, even if its from the same vendor. Even the drivers vary from card to card! Heck even the vendors are unsure as to how compatible their controller cards are with various enclosures. That is proprietary, not industry standard. OS upgrades doesn't seem to provide native driver support for Direct access and/or port multiplying interfaces. The problem with this is that film/video users like myself like to build bullet proof systems, and with raids that I've built from IDE, FW, or USB, I've never had the minutiae of compatibility issues as I've had with esata. I installed an Acard raid controller in my dual 800 back in 2001, installed the drives and forgot about it. it just worked through multiple OS upgrades. Not sure whats gong on with esata.
    5) Can't call it hot swappable if I can't get the **** thing to wok in the first place.
    My analysis is this: Esata is basically a proprietary format to the vendor that sells the hardware, while USB/FW is an industry standard. I bought a quality enclosure that said "esata", I bought a quality controller that said "esata", it didn't work. I had to learn the hard way about DA and PM enclosures and now about chipset conflicts. I've built computers since the late 80's amiga days, hot-rodding that computer well beyond spec and with custom cooling. SCSI terminators and IDE master/slave issues were easy-cheesey because they followed straightforward rules. This esata stuff is just plain sloppy work on the part of vendors and as Danny Glover said I'm getting to old for this **** as far as being a beta tester for hardware.

  • MAC PRO USB Problem - Traced to bad Apple Keyboard Extension Cable

    I found a fix to a problem synching to my itunes Library on my early 2008 MAC PRO.   The Apple supplied USB extension cable for the keyboard was defective.
    The symptoms were hangs in itunes and finder synching to iPods and transferring data to USB hard drives. The iPods and hard drives never lost power and no errors/log entries were made. The transfers simply stalled and would not continue. itunes and finder would hang until the drive or ipod was removed. These devices were installed directly to USB ports on the MAC PRO. No other USB devices were connected except for the aluminum keyboard and mighty mouse; the mouse was connected to the keyboard. The keyboard was connected using the USB extension cable that shipped with the MAC PRO.
    Hardware diagnostics were all clear. The keyboard and mouse never had any connection problems. Only itunes syncs and hard drive copies would fail; these would occur at random times. I had an open ticket with Apple to have the logic board replaced as it was diagnosed to be a hardware/USB problem.
    Removal or replacement of the extension cable on the keyboard (which was connected to a different USB port and NOT in the USB chain with the ipod and hard drives) permanently fixed the problem. I cancelled the Apple HW replacement.
    I have noted several posts with others having problems with USB ports and devices. I wonder if Apple has an unknown problem with bad keyboard extension cables.

    I think you may be onto something there. I'm just a few weeks into my second Mac Pro and again it's having the same USB problems which led Apple to give me a replacement machine previously. I went through several weeks of considerable testing with Apple Engineers prior to that - an Apple Care application to collect data from my machine, Apple Developer USB prober and two clean installs. The latest machine initially showed no sign of the problem then it started again - 2 iPods "can not be read or written to" part way through sync, Aperture quitting importing from USB SD card reader, USB drives dismounting etc. So I pulled out the Aluminium keyboard and, lo and behold, the iPods managed to get all the way through synching without errors. I really like the alu keyboard so it's a huge shame that it might be the cause of all my problems so far - and the Mac Pro is otherwise a beautiful computer.
    But is this really a hardware problem of the internal USB cards and power management or supply?

  • Spilled liquid on top of mac book pro; usb/wifi problems.

    So yesterday evening I spilled hot chocolate on the top of my mac book pro while it was sitting on my desk closed. I picked it up, unplugged everything from it and grabbed a towel so that I could try it off. I got most of it off and nothing got into the keyboard area underneath. But I did see some of it get into the side ports and mainly the first usb port. I just realized that now when I plug something into that usb port, the wifi and usb don't work! The second one is reliable and works fine, it charges and plays audio. That is basically all I use it for. But now I am limited to just one usb port, it could be alot worse. It is an annoyance though, especially since I bought this laptop literally a year ago. From what I understand Apple will only guarantee their product for one year and won't honor most customer accidents. So with an expired warranty by just days, I am left with a perfectly working computer -1 usb port. I know getting frustrurated wont solve anything and I've spent the last hour figuring out why the internet and mouse weren't working.
    What are my options? Anyone else have this kind of problem? Is there something I can do to fix my computer?

    Take the computer to an Apple store or an AASP.  Whichever is more convenient for you. Liquid damage is not covered under Apple's standard 1 year warranty or Apple Care.
    NOTE:  If you are out of warranty and purchased the computer with a credit card, discuss the warranty issue with the credit card company which you purchased the computer with.  They are the only ones who can at this point cover the computer after it goes out of warranty with the manufacturer (Apple).
        If you have Homeowners insurance, place a claim with them.
    How to remove and clean your Macbook Pro Keyboard
    Cleaning Macbook keys after a spill

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