While most boards will survive such the brutal thing here is that you could have shorted both channel outputs to ground and the output has been fried.
My last hurrah test is to boot up Linux from a LiveCD for final testing and then proceed to disabling the onboard card in favor of a new soundcard.
I am experiencing a weird problem in Windows Xp - no sound
from the onboard sound card. If i try to adjust volume from the main
toolbar, i get a motherboard beep. BIOS is setup ok to use onboard sound, all drivers are ok etc. Seemed to do this after using tunebite
program, or possibly after leaving jack plug for speakers pulled out 1/2 way...but I doubt this was it?
Any ideas anyone??