X220 tablet (about 2.5 yrs old, out of warranty) was working completely fine last night; this morning, no sound is coming from the laptop, either through speakers or through headphones (audio jack). I am, however, able to get sound through a bluetooth-connected speaker.
I had hoped this was a software issue. Tried uninstalling/installing all sound devices, updating BIOS, updating drivers, system restore to previous date, rebooting a million times, etc. No joy.
When I run the sound troubleshooter, it says that no speaker, headset, or headphone appears to be plugged in. The sound icon has a little red circle/white X next to it. When I try to plug in headphones, nothing happens -- does not seem to detect the event. When I press the mute and volume buttons on the tablet, no response.
Also, under Device Manager -> Sound, video and game controllers, it lists only "Bluetooth Hands-free Audio" and "Intel Display Audio". I don't think either of these is the normal X220 audio driver, is it? What else should be there? I downloaded the Conexant Audio Software from Lenovo's site (this is what came up when I searched for audio drivers for the X220 tablet), and tried to install it, but halfway through, it said the install failed because it couldn't locate the device for the driver.
This sounds like it's a hardware problem -- any way to verify? Also, which piece of hardware exactly? Is it the sound card (that's presumably integrated into the motherboard --> no easy fix)? I'm guessing it's not the speakers themselves since the headphone jack is also affected, but what is my best line of testing at this point to confirm that? If it IS the sound card, any suggestions on the best fix?
Many thanks in advance!
