You must format the SDCARD in 16 bits
To enter in "WINCE Upgrade" Menu (bios,bootloader) you must turn off the gps from the side button (on/off)
1. Push and Hold the reset button and turn on device (on/off side button) to enter in blue menu "Wince Upgrade"(reset+power on side button).To select press power on front button(red one) and for enter is reset button.
2.After you complete the upper steps select and enter "Other tools"(maybe when you enter in flash mode the gps may enter in "WINCE Upgrade" please select exit to see the main menu)
3.Push and select "Clean flashdisk"
4.If you have the update files it's OK, if you don't have them I atached them from a becker 7934.
Copy the folder "update_files" and "autorun" to your sdcard
5.Turn Off the gps from side button (on/off) and insert the sdcard then turn it on.Now You will see on the screen copying the files to flash disk.
6.Now you can start using your GPS.
If you don't want to copy the files each time you start the gps please delete "update_files" and "autorun" from your sdcard.
Guide:
http://allschematics.com/public/GPS/...4/how%20to.txt
Files:
http://allschematics.com/public/GPS/...ecker_7934.rar