Hi I have a Mk1 DX7 with the SuperMax board, which until recently was fine. Suddenly, it seems to have re-tuned every key to about 50Hz ! The on-board battery is fine according to the LCD and the DX works fine as a MIDI keyboard. I suspect that the Supermax board is at fault and wondered whether I could just pull the board out - so here are the questions : 1. Does the board plug-in or is it soldered? 2. Does the supermax board have its own backup battery which could be responsible for the problems 3. If I remove the supermax board, will I be missing the original DX7 ROM? As you can see, I only have a vague idea of how these boards were fitted (my DX7 was bought s/h with it installed). Any help would be GREATLY appreciated. Thanks Adrian
