Hello again! Thank You very much for replying back to me! I did as you suggested and opened it up ... followed your instructions which were VERY VERY HELPFUL! So great full that I found you! I found multiple weights that had fallen out .... one weight was blocking the two keys that were dead! Problem resolved! Thank You so much for posting these instructions .... there is very little info out there on the PN-80. My oldest daughter learned to play on this keyboard (has an upright now) and now my younger daughter will inherit it for her new house!