I recently upgraded my Blackberry Bold 9650 with the new OS. Now, certain keys on my keyboard (s, l, g, h, w) aren't working. I tried a battery pull and it didn't do anything. It hasn't worked since last night, around 7PM. This has happened to me before, but letting it sit for a few hours fixes it. I can't type in my password because it includes some of the letters that aren't working. How can I fix this (without taking it to Verizon)?