I have a Dell Latitude D600. It will not...

Don- I went to Dell support and without knowing a service tag #, I looked your laptop generically. Here's a link to your owners manual: http://support.dell.com/support/edocs/systems/latd600/en/ug/index.htm The only thing I could find about "light error codes" was in the solving problems category. I read something that said your battery/laptop is too hard to charge. I replaced the motherboard recently in a friends d800 because the power jack had got pushed in and dislodged from the motherboard,then wouldn't charge the battery. Although she had no error codes OR a docking station.You said you replaced the battery and the cord. Did the new battery/charger ever work right? if no, why didn't you take it back? Is it still under warranty? Without more info, best I could come up with. Hope this helps and good luck.If I helped please rate me. Thanks -jmattes

change the adapter