Hello. I have a Kawai GMega sound module that I used for years as an expander with a live rig. Now, it will only sound its "Program #1", which is titled "GrPiano". So far, I have read the manual, looking for settings that might cause this; I have done a System-Edit Factory Reset, more than once, and scrolled through every parameter that I could think of to find out why it is stuck. All of the other usual functions seem OK: the sound is great, it responds to MIDI commands as usual, and there is no "flakiness" that would imply hardware problems such as a fault with the power supply or main PCB. In other words, being stuck in Program #1 seems to be its only problem right now. If anyone in the group has experienced this with the GMega, please let me know how you got it back on its feet.