I haven't spilled anything on my HP Pavilion DV6 laptop, but suddenly the "t" and "y" keys do not work. I've tried deleting the keyboard in Device Mgr and letting Windows 7 Home Premium refind and install the device. Didn't work. I've got compressed air and shot air under the keys. Didn't work.

The laptop is 3 yrs old. Do they just crap out - planned obsolescense?

Where can I find instructions on how to take the keyboard out and clean the whole thing?