I have thie same problem but mine wont charge with the laptop turned off, A fully charged battery will make it run
My Toshiba Sattelite laptop will start up with a fully charged battery but will the cord will not charge the battery. I have tried everything I can think of including changing the part on the computer where the cord plugs in. no go. I have tried turning off the laptop and charging it, the ..hold the button down trick, but have had no luck. I have replaced the power cord twice thinking that was the problem but that didn`t work either.