Ouch - I kmow the feeling, and have two laptops permanently on KVM as a result.
Do you know if anything _physical_ happened to it? If the enter key is broken, it suggests that it's physical damage or malfunction - not software related. Try firing up Knoppix from disc and see if th kbd reacts properly.
The next thing is Hoover or compressed air and vigorous (!) inversion. After that, it's separation for a date with Mr Methanol, with a good chance you might lose the lot.
Severe bummer. Good luck
BOFH