Re: The status and fate of Boss SE-70's
Years ago I read somewhere that the garbled display might be solved by replacing the button cell. It’s possible you’ll need to reset the patch data memory as well? (Factory settings.)
Button cell replacement
https://youtu.be/C_62J3lMJSsRestore factory settings (from Sweetwater)
The SE-70 has two sets of factory Patches; those designed for guitar processing
(GUITAR) and those for general processing (STANDARD). The following procedure
will clear the internal memory and reload the factory settings:
(CAUTION: All USER information will be lost. Be sure to back up any information
you wish to keep.)
1) Power on while pressing the NUMBER/VALUE knob.
2) Press the LEFT PARAMETER (<) button and use the VALUE DIAL to select
“STANDARD” or “GUITAR” mode.
3) Press WRITE.