1. Try the generic reset noted in the Laptop Troubleshooing Forum.

SHORT VERSION. Power off, remove AC, battery, press the power button for 60 seconds, slip in battery, apply AC and try again.

2. Replace the CMOS battery. A few machines will not start with a dead one. At 1 to 10 bucks I think this is a good GAMBLE. Some can't gamble?
Bob