I have a Lenovo ThinkPad T410 laptop computer running 64-bit Windows 7 Pro. Several days ago, the sound output dropped dramatically. With sound levels set to 100%, the sound level is still quite low. I have my laptop hooked up to Harman Kardon soundsticks. The speakers are fine; I tested them by running sound from a tablet through them. There is no separate sound card: it is integrated.
I've attached a screen shot of the "Intel Display Audio" qualities. I have a feeling it's a hardware problem.
Experts please advise.