i have a Garmin Nuvi 255 . Last night I connected it to my computer and disconnected it afterwards. I was unable to turn it on. When I press the power button, the logo shows up for a few seconds and disappears. Press top left corner of screen and power on tried, no use. Press bottom right corner of screen and power on tried, no use. Connect to web updater, and couldn’t find device. All this made a hectic experience for me. Please, if anyone has faced this problem, may send their feedback.
