It's probably not a mobo issue.
It's most likely the brick, which you can pick up a universal adapter at Office Depot for $100 or so.
Ebay is also option.
Have you tried plugging into different outlets around your house? I had mine plugged into a outlet once, and it wasn't charging it, even though it was plugged in.
ATM I'm rocking a;
P7805u Laptop:
17" 1920 X 1200 Display
Intel Centrino 2 @ 2.27
4 GB DDR3 Memory
320 GB HDD
1 GB G-Force 9800M GTS Graphics OC'ed