Thread: Nuvi Pre-boot Mode

Originally Posted by "from post3"

Pre-Boot for navigators nuvi 3450, 3490, 3760, 3790

[COLOR=#333333

1. Turn off the navigator.[/COLOR]

2. Press the upper left corner of the screen.

3. Turn on the navigator and press in the middle of the screen (over the letter "G" of the logo Garmin). Keep on holding your finger on the screen.

Friends,
After a great fright when the Upgrade.exe crashed in the middle of the installation of original firmware of my 3790 (with 3490 fw) and my gps has blotted out totally, noticed that there is a substantial difference in the procedures for entering in pre-boot mode of the 3790 and 3490 firmware/gps. I could only get in preboot after dozens of attempts 99% wrong.. So I'm posting here the way that I judge the more accurate and fast to enter in pre boot on these gps/firmwares.


The fact is that the procedure, or rather the position of the finger on the screen, is different for the 3790 and 3490 (device/firmware)
The procedure works 100% with no errors and at the first attempt:


- For 3790 with original firmware: place your finger ABOVE letter G (25 X 40mm position, as pictured above) only at the time that the Garmin logo appears.
Appearing "system, system .." in the screen the procedure is correct, and follow the process.


- For 3490 (or 3790 with this firmware): position the finger OVER the letter G (35 X 40mm position) only at the time that the Garmin logo appears.. If you see "system, system" .. the procedure is correct (it is not necessary to enable Mass Storage). Just take the process sequence..