Thread: How to make a service (cure) firmware for your Garmin unit

Help neeeded ! please. I have a nuvi 255w and (unfortunately) i loaded a map from internet, i named gmapprom1.img (i saw it somewhere) and.... the unit doesnt start... when turning on, shows the loading maps text for a few seconds and turns off. When conecting to PC, happens the same, loading maps text for fex seconds and turns off and turns on and off in a cicle.

Read lots of forums:

1.First tried to reset by turning on the device and click the screen on botton-right corner. nothing happens. with and withouth sd.
2. pre boot ? move and hold for 8 seconds the power button, and the same happens, loading maps text for seconds and turns of. with and w/o sd.

I really cant access to unit to perform any cure you mentioned. If i only could access from my pc to the unit, and delete the (unfortunately) wrong gmapprom1.img file...

Please, if you can give one extra advice or should i go for other unit? i loved my 255, all my pois, places, etc i would hate to loose it. And promise not to do such copy paste again. Thanks in advance.

@ matiasmalaccorto

Write the HwID of the unit and I will post you a firmware which will give you access to the memory of the unit where you can delete the problematic file.