| | Re: Keyboard freeze ups and keys not working on a 7730
Most of the time, problems with keyboard are due to some sort of physical damage such as moisture or drops. If the device was subjected to moisture and wasn't properly dried, you could be out of luck. There is a FAQ that talks about what to do if a device gets wet if it happened recently.
Since the 7730 is relatively old, not sure how much support(hardware or software) you'll get for it.