I have a Dell Inspiron 2200 that was dropped about a year ago and it hasn't really been right since. The d/c jack was loose after the fall, and it eventually got to where it wouldn't power up at all. I sent it out to a shop that specializes in D/C jack repairs, and it came back after presumably being repaired. The battery was totally charged when I got it back, and the machine did start up with the A/C adapter plugged in. However, it got as far as the screen with the Windows XP logo and the screen went blank, although the battery light was still on. I tried starting it back up again without the A/C adapter. This time, it booted up like it was supposed to and reached the desktop, but was running very sluggishly. When I plugged the A/C adapter back in, the screen went blank once again. I'm beginning to wonder if the problem was totally a d/c jack issue or if (horrors!) it's a motherboard issue. It does still seem to be charging with the A/C adapter. Any thoughts?