Wits End - No Sound in Windows 7 64 bit

Hello.

Only thing I can think of is if Windows for some reason decided to port the sound to something like a HDMI adaptor... Possibly a display port?

I had this problem with my Mac Pro when using external speakers. The Jack sensing switch isn't sensitive enough to detect my speakers 3.5mm plug. This isn't a problem with OSX as it will output sound regardless but Windows refuses to output sound to a Jack with nothing plugged Into it. For me, taping the speaker cord to the side so as to activate the Jack sensing switch did it.

Obviously, this wouldn't affect your iMac's internal speakers.

Good Luck,
Keri

 

Hi

I just joined this forum looking for information on the same exact problem so you are not alone. Here are my details.


I installed Windows 7 on a Boot Camp partition in my 13" Mac Book. The Mac is not a Mac Book Pro. Its an Aluminum Uni-Body Mac Book purchased new in December 2008. The Mac partition has MAC OS 10.5.5 loaded on it. I have been told by several Apple geniuses that there is no such thing as this model so let me clarify that there is. It has no fire wire port and no back lit keys.

The problem is no sound when booted into Windows 7. Nothing out of the speakers and nothing out of the headphone jack. Audio works fine when I am booted into the MAC OS. I have not tried SPDIF as I have nothing to test it with. In Device Manager everything is fine, working normally and enabled. Speakers Properties are all set to default - 16 bit 44.1Khz sampling rate. Both Exclusive Mode boxes are checked. Enhancements are all off, level is up and balance is at 50 % Left/Right.

There are 4 drivers listed at C:\Windows\system32\drivers

dmk.sys
HdAudio.sys
ksthunk.sys
portcls.sys

There are 2 listed at C:\Windows \system32

SysFxUI.dll
WMALFXGFXDSP.dll

Provided is Microsoft. File Version says 6.1.7600.16385 (win7_rtm.090713-1255)

Any suggestions are appreciated.

 

Does the iMac have a Cirrus audio chip? If so, then try this driver, which was provided by Apple for the latest 13" MacBook Pros.

The late 2008 Unibody MacBook has a RealTek audio chip. I'd advise you to download the latest Windows driver from their support web site and give that one a try.

 

Workaround for no sound on external speakers

Hi,

After googling for two days, I finally found a workaround for my macbook pro 15'' (macbookpro5,3).

I had sound on Windows 7 64bits (with volume ok) and without the red light problem, but i couldn't hear anything from my tv with sound cable connected to headphones. My current version of bootcamp is 3.1 (with all drivers installed from it).

I tried all kind of things (drivers from vista64, xp, bootcamp 2.2, realtek, etc.) with no luck. THE SOLUTION FOR ME WAS TO INSTALL LATEST DRIVERS FROM NVIDIA (YES, graphics drivers) OVERRIDING THOSE FROM BOOTCAMP 3.1. After macbook restart, MY EXTERNAL SPEAKERS STARTED WORKING!!!

Hope this helps to anyone.

 

Thanks man, this fixed me!

 

Thanks ssn637!!!

Just purchased a macbook pro 17" and had been struggling with the sound issue for 2 days. Fixed instantly with the new Cirrus driver! Eve

 

Anyone fixed this with a late 2009 Macbook?

It has the Intel HD chip and no matter what happens, I can't get sound out of it, and Windows doesn't seem to think there is a problem. Like so many others, the headphone light is stuck on.

As an edit, I had a HECK of a time getting everything working with this Macbook and 64 bit Win7. I had to install half a dozen of the device drivers manually with packages straight from the manufacturers. The only thing left is the sound (which APPEARS to be working, but switching from speaker to SPDIF and back again does nothing, though graphically the sound dings the visual meters) and some random "Bluetooth Device" that doesn't seem to have an impact on anything (the bluetooth works fine)