I have a Toshiba laptop M45-S265 (part of the Satellite series). I took my computer in to Circuit City to have a laptop fan replaced. When I got my computer back, I noticed that the volume knob was actually INSIDE the computer. Circuit City was able to fix this problem but now I have sound only out of one speaker. They checked and could not find anything wrong with the wiring or sound options on my computer. I have since bought an external sound card (Turtle Beach). It worked wonders for months, but it started to go bad recently (the sound starting crackling and skipping like a CD when I tried to listen to a MP3 file or movie). I bought a new 3D Sound external audio card, and I can only hear out of one speaker on my headphones. I was wondering why my Turtle Beach sound card never had this problem. Is it because the new sound card connects directly to the motherboard? If so, I think this is the reason for my internal speaker problems. I know for a fact that it isn't my headphones. With the new sound card, the sound is not "skipping" or having an static. I'm just having the same problem with the sound card (can only hear through on speaker) that I'm having when using my laptop speakers. Both sound cards are USB plug-ins. I should add that at first Circuit City was unable to get any sound at all. They managed to fix one speaker. I might just buy a new Turtle Beach sound card. With my headphones plugged in, everything was fine. With the new USB sound card, I'm having the same problems I was when using my laptop speakers. I thought all USB external sound cards worked the same.