and heres what i read about resetting the c-mos (if this doesnt work) . one of you will have to explain this jumper to me :
Remove all sources of power, i.e. battery, usb devices, ac supply, etc. and then press the power button down for 30 seconds....see if that helps as it would reset the BIOS..!!
If still no success, you need to clear CMOS.
DO if you are comfortable and on your risk.
there is CMOS clear jumper
it next to the RAM slots.
this is tricky, the jumper is not a switch or like on a HDD a small piece of plastic. it just a small patch of soldier contacts.
that you have to bridge with a small piece of copper wire or tin foil.
once bridgd remove battery and powe ron yout laptop and shutdown.
it will clear CMOS, unbridge and put everything in place.
It will resolve the issue.
(didnt post link cause they charge 50.00 per answer)