The light comes on only when I boot into Linux on the E250 I have. I don't have the blinking during post. I am going to try to patch it with a file that Eric Brower gave me. I haven't installed it yet. You may want to do a check on the machine if it is giving you this light during post. Mine is all off through that stage and comes on and stays on after booting to Linux. There are probably others here with more knowledge on it than I. I will post my results on the patch, if I don't screw the machine up doing it. Thanks again Eric.