Well, what indications do you have of it not starting? You have to give us some details.
I have heard in DELLS that you can put them in a microwave for 30 seconds to fix those.
NOTICE-IF YOU PUT ANYTHING THAT IS NOT FOOD OR DRINK INTO A MICROWAVE YOU RUN THE RISK OF FIRES, EXPLOSIONS or INJURY! NEVER PUT METAL INTO THE MICROWAVE! -NOTICE!