[size=200:301cf]Garmin GPSmap 276C (Plus), 376C, 278, 378, 478, 296, 396 and 496[/size]

[size=150:301cf]Secret Commands[/size]

There are some secret commands in the Garmin GPSmap 276C (Plus), 376C, 278, 378, 478, 296, 396 and 496 receivers.

Self Test
When the unit is turned off, keep the POWER and ENTER/MARK keys pressed until a test page is displayed:

All keys, except the UP and DOWN keys, have been pressed once and all passed (marked with green).
Other tests were passed too. The backlight level may be increased by the UP key and decreased by the DOWN key.
Any successive presses of the PAGE key will display more test pages (for testing colours, grey scale, geometry etc.).

User Reset
When the unit is turned off, keep the POWER and QUIT keys pressed until this question is displayed:

Warning! Answering Yes to the question will erase all user supplied data (such as tracklogs, waypoints and routes) and preferences (such as setups), and the whole unit will be set back to factory defaults.

Master Reset
When the unit is turned off, keep the POWER and OUT, QUIT, NAV/MOB keys pressed for 10 12 seconds.
Warning! This will clear all data including the almanac data and temperature compensation curves for the crystal oscillator! Eventually the compensation curves will be reconstructed, but it takes time; see http://gpsinformation.net/main/diagnost.txt .

Restore
If the unit "crashes" (as Windows may do) when flashing firmware or it does not power-on, try re-flashing the firmware:
When the unit is turned off, keep the POWER and PAGE, ENTER, DOWN keys pressed to turn on the unit. Also keep the last three keys pressed when re-flashing the firmware with a good copy.

Warning! The self test and user reset only have been verified!
Most of the information here was found in http://groups.yahoo.com/group/Garmin_GP ... essage/195 .
These commands are not mentioned in the GPSmap 276C Owner's Manual http://www.garmin.com/manuals/GPSMAP276 ... Manual.pdf (Rev. C and older).

Tomado de: http://home.online.no/~sigurdhu/GPSmap- ... mmands.htm

Ese equipo necesita la tarjeta externa, que es opcional, para que puedas montar mapas. Si no la tienes, comprala y que sea de al menos de 128Mb.
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