this was how to clear the bios/cmos on my Lenovo R61i. For some reason I had to call tech support as the info wasn't in my manual.
disclaimer - I don't know if it will work and I don't see how it could hurt but it was for a different machine.
Unplug the laptop, take out the battery. Open up the lid, press and release the power button 10 times, then hold the power button in for 10 seconds and release. Re-insert battery, plug back in and try to power on.
It seemed crazy to me, but it cleared the bios and reset the bios to factory defaults. All I had to do was reset the time and my laptop worked again.
Let us know if it works.