.....Forgive me but M6400 forum owners must be too old to answer my question maybe you wiz kids will help!!!  [:^)]  Will 300W Alienware adapter work ok instead of 240W adapter?.  I read from another member that it worked for him but there is no follow up on post so I do not know if it worked for a short time and later fried his machine. I do know M6400 or picked about not booting to less powered adapters 

.....So will you help a brother out here???????????   [8-)]