No Audio with Macbook Pro

I had the same problem, went into the device manager found a device under system devices, with a red x do I double clicked it and updated the driver manually using the realtek audio high definiton driver,
and low and be hold it works! finaly after months I've got it to finally have sound on the pc side it is a issue with the device drivers supplied by windows go to realtek get the newest version and re-install the drivers dont let windows doit for you! Now to figure out how to get the audio to work, with the keyboard audio keys I haven't figured out yet.

I have no sound with my iMac, I tried everything that has been said here above but no results.... Where to do I extract the files from this zip file?

Just my 2 cents here. I did what i saw here.

Went to the device manager in XP and saw that ! mark, did the reinstall and he did found a new driver and now eveything works ok 😉

Thanks for the tip!

Hi

I'm running XP SP3 having recently rebuilt the Windows side after a typically irritating unsolvable browser error. Rebuilt it to have this no sound problem, the 'Instance already running problem', etc.

Install this Windows patch - * http://couponmeister.com/blog/HD_Audio/KB835221.exe* (not on MS for immediate download). Uninstall any drivers associated with High Definition Audio if you're showing any in device manager. Re-install the Realtek Audio drivers off the Leopard disk. Reboot. Hey presto.

Worked for me after a lot of struggling with alternative drivers and research.

This worked for me, only after the reboot, I had to right click and do an "update driver" one more time. I am also running Service Pack 3 from a fresh install CD. Thank you for the solution. I was ready to toss my laptop out the window. 🙂

This did not work for me. The service was already started. However, this was an XP SP 3 install, see solution above.