Hard reset for the Ensoniq SQ-80
1. Press and hold the (RECORD) button
2. Press Soft button (1) (upper left hand corner of screen), release both buttons.
3. Display = ERASE ALL MEMORY AND RE-INITIALIZE
4. Select *YES* Display returns to sign on message. All RAM is erased and all internal programs reset
5. Press and Hold the (RECORD) button
6. Press the (FILTER) button, then release both buttons (verify that all filter values are above140, if they are not above this value you should probably have your unit serviced at an authorized service center).
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