I was using my HP Pavilion dv6 under a hot sun the other day, when some keys became a little unresponsive. I moved into the shade, thinking they'd come right with less heat. It was not to be; three days later, my 'p' key and seven neighbouring keys are completely nonfunctional. I pried off a keycap, and removed the two small 'frames' that lay beneath it. I removed hair etc from the newly exposed area. Still no joy. I removed the k/b ribbon cable and inspected it and its connector. Looks fine. I'm thinking of sticking the k/b in the freezer for a while - is there anything I can try before attempting this possibly drastic step?