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Red light from headphone jack.

3285 Views 6 Replies Latest reply: Dec 14, 2009 10:33 PM by Rod Hagen RSS
lobotomy628 Calculating status...
Currently Being Moderated
Dec 12, 2009 11:11 PM
Hey Everybody,

I have recently installed Windows Xp to my MacBook Pro which has Snow Leopard and all of my software is up to date. When ever I run Windows Xp a red light comes out of my head phone jack and stays on. Unlike all of the other posts that I have read my internal speakers work, my headphones work, and anything I plug into that jack works at all volume ranges. My question is why is this red light on? What is it? Is it bad? and How do I fix it?
MacBook Pro, Mac OS X (10.6.2), Windows Xp
  • iVmichael Level 6 Level 6 (13,725 points)
    Currently Being Moderated
    Dec 12, 2009 11:39 PM (in response to lobotomy628)
    Welcome to Apple Discussions

    The red light is a digital audio output signal - the socket can deliver both analogue and digital and is switched inside depending on what's inserted. If it's got stuck in that mode try inserting/removing a regular headphone jack while wiggling it a bit.

    2.4 Ghz 15" 4GB RAM 500GB/7200 Unibody MBP, 60GB iPod, iPhone 3G 16GB, Mac OS X (10.6.2), Assorted other Mac's and PC's running OSX, Linux, WinXP, Win7
  • iVmichael Level 6 Level 6 (13,725 points)
    Currently Being Moderated
    Dec 13, 2009 9:17 PM (in response to lobotomy628)
    Try doing a Parameter RAM reset - hold down apple/option/p/r keys at start up and wait for three chimes before releasing the keys.

    2.4 Ghz 15" 4GB RAM 500GB/7200 Unibody MBP, 60GB iPod, iPhone 3G 16GB, Mac OS X (10.6.2), Assorted other Mac's and PC's running OSX, Linux, WinXP, Win7
  • tele_player Level 5 Level 5 (5,380 points)
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    Dec 13, 2009 10:07 PM (in response to iVmichael)
    The original post mentions that the light stays on only in Windows - my guess is that there's a problem with the Windows driver for Apple's audio hardware - missing, or buggy. Apple's multi-purpose digital/analog audio port is pretty unusual.
    MacBook Pro 13", 2.26Ghz,4Gig, WD 320G 7200 HD, Mac OS X (10.6.1), Logic Studio 8, Focusrite Saffire
  • Rod Hagen Level 7 Level 7 (31,985 points)
    Currently Being Moderated
    Dec 14, 2009 10:33 PM (in response to lobotomy628)
    I think that the answer is probably that you simply need to update your version of BootCamp Windows Drivers - see http://support.apple.com/kb/DL967

    Some people seem to suggest that installation of updated 'Realtek" drivers in Windows may help.

    Given that the problems seems to involve interaction between Bootcamp and various drivers I doubt that reinstalling your Windows OS will resolve it, though, as I don't use Windows, I'm not in a position to test it myself.


    Cheers

    Rod
    MBP 13"2.26, MBP15"2.2, iMacG520"RevB , MB2CD, MBCD, ,PM5400/180 & earlier, Mac OS X (10.6.2), 7 chooks, 2 dogs, 2 daughters, 1 pear tree, 0 partridges, itinerant bats, magpie

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