|There is no button or setting that I know of that disables the built in keyboard, and if there was absolutely nothing on it would work.|
Make sure no keyboard keys are stuck in the depressed position.
Since the last time this laptop worked correctly, have you, or is it possible anyone else has
- dropped this laptop, or otherwise subjected it to a physical jolt ?
- spilled liquid on it, or exposed it to liquid such as rain, or have you sprayed it with liquid (it doesn't matter if it was running at the time or not) ?
- has there been a power failure event when the AC adapter was plugged into it ?