This problem arose out of the blue. I've been using a SBL-Value trouble free for a couple of years, until today. I just finished a fresh install of Win2K & noticed my left headphone speaker wasn't working. Even with the volume cranked, all I can hear is a barely audible crackling sound > kinda like a blown speaker would sound. I tried plugging in my speakers instead, but this yielded the same results.
Changing drivers doesn't help. I have double checked all wiring/connections (speakers too) as well. The only time I hear sound from the left speaker is if I pull back (out) the plug (speaker or headphone) slightly. Then both speakers work, but the sound does not sound "natural". If I push the plug all the way into the jack, the right sound is fine, but left sound no worky.
have you tried the headphones in antoher device? Try this first. If they work normally then you have a connection problem inside the headphone jack of the soundcard. A can of electrical contact cleaner should take care of the problem.
It's not what they tell you, its what they don't tell you!