We moved to a new house that apparently has power surges (hooray!) After one such surge our Celviano AP220 stopped turning on. I bought a new power supply and now it turns on, but it won't play. When it turns on it makes a very loud sound similar to when someone plugs a microphone into a system that is already on. Then it will not play from the keys, from demo, or the metronome. It also does not work through headphones/outside speakers. Any idea which part might be malfunctioning and whether a handy person would be able to replace on her own? Thanks!