I've had my XPS 400 for quite some time now and have used the integrated media card reader frequently. Just today, the media card reader stopped working. I first noticed this when I inserted a media card and the green led light on the reader came on for a second but then went out. I could not access the media card in My Computer, and the drives themselves were no longer listed under My Computer. I opened up the CPU and checked the cable, which seemed to be connected fine, and I reconnected it to make sure it wasn't loose. When I restarted the computer the drives appeared under My Computer, but as soon as I tried to insert a media card they disappeared again. So I shut down and tried reseating the cable again, but to no avail. The media card reader drives are still not available. Dell XPS 400 Windows XP Media Center Edition