So I've got this Inspiron 600m that won't power on. I took the charger for my 1420(research says they use the same charger) and hooked it up. When I did the light on the power block went out and the 600m was not charging. When I reconnected it to the 1420 it would not charge it either. After disconnecting it from the socket and reconnecting it started working again. As soon as I try to connect it to the 600m the proccess starts all over. I am assuming it is a dead battery but wanted some more insight. I don't want to buy a new battery if that's not the problem. Any suggestions.

TIA!!!