Last week I bought a bricked nüvi 255 on the flea market. It hangs on "Loading Maps...". I thought it would be easy to unbrick, but not so... :( Getting it in pre-boot is easy. However, the moment I initiate flashing cure FW with GarminCure3 and Updater.exe, it drops out of pre-boot so the flash fails. It makes no difference if I initiate the flash 5, 10, 15 or more seconds into pre-boot mode. Pre-boot ends the moment the flash is initiated. Keeping it in pre-boot for more than 40 seconds brings up the calibration screen, which is frozen. Not sure if it is possible to use a microSD to flash cure FW. If so, please let me know how.
Using g7towin64, I was able to read the usual details from the device. The HWID is 1074 and the loaded FW is version 6.00.
Using g7towin64, I was able to read the usual details from the device. The HWID is 1074 and the loaded FW is version 6.00.