My Dell Laptop headphone socket has come loose inside & no longer works, although the main speakers still work OK. I looked on the net for a fix and it appears Dell say a new motherboard is needed. I didn't want to pull the laptop apart to try and fix it myself in case I damaged something and made things worse. Fleabay has poor reviews with USB Sound Cards (hiss & over heating) but I decided to take a chance with THT Trade on Amazon (1226 7.1 Channel USB External Sound Card Audio Mic Adapter USB £). I ordered the card Sunday & the item was delivered two days later. I plugged it into the USB port and the drivers were automatically installed (Win XP Pro). I played a music file and the onboard speakers were automatically disabled and my headphones worked brilliantly - no hiss, crackle or distortion. This USB card has a volume control built in but it's not needed because the speaker icon near the clock on my desktop works the USB card volume when it's plugged in, and it works the onboard speakers when the USB card is pulled out. If you disconnect this USB card part way through playing a Youtube video file the onboard speakers do not automatically come on, you have to start the music/video file again (but this is no problem). THT Trade give a 12 month warranty (which I hope I will not need). The card has a microphone socket which I have not tested, but I don't need either. I have not tested the card with external speakers - I only wanted a fix for the headphone socket and this card does that perfectly!