Fender Mustang GTX Series Owner's Manual page 63

When performing a firmware update, the user might encounter three scenarios in which a firmware update
cannot be initiated. In such cases, the DISPLAY WINDOW will indicate that Mustang GTX's WiFi connectivity is
not configured, no update is available, or the amplifier update server is unreachable (see illustrations below).
AMPLIFIER UPDATE SERVER
WIFI NOT CONFIGURED NO UPDATES AVAILABLE
IS UNREACHABLE
PLEASE RESTART YOUR AMP
In addition to the firmware update described above, Mustang GTX offers several user-enabled start-up modes
encompassing factory restore functions. These are described below.
RESTORE ALL: To restore the factory presets and amp settings contained in the amp's most recent firmware
update, press and hold the PRESET LAYER button (green arrow in illustration below) for five seconds while turning
the amplifier on. This function is also accessible in the "EQ & Amp Settings" MENU under "RESTORE ALL" (page 53).
WIFI UPDATE/RESTORE ALL: To combine a firmware update and the start-up option directly above (RESTORE
ALL), simultaneously press and hold the ENCODER and the PRESET LAYER button for five seconds while turn-
ing the amplifier on (blue arrow in illustration below).
FORCE UPDATE: To update Mustang GTX if there is a problem with the previously described firmware update
process, a "Force Update" mode can be initiated by pressing and holding the ENCODER and SIGNAL PATH LAY-
ER button while turning the amplifier on (purple arrow in illustration below).
RECOVERY: To recover the base firmware version (displayed in "About This Amp, " see page 54) including presets,
simultaneously press and hold the PRESET LAYER button and X FX utility button for five seconds while turning
the amplifier on (red arrow in illustration below).
RECOVERY
WIFI UPDATE/RESTORE ALL
RESTORE ALL
FORCE UPDATE
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