I just bought a garmin nuvi 255. Few minutes after starting to use it, it automatically shut down. When start button is pressed, it only starts for a few seconds then shuts down again.
I have the same issue with my nuvi255 and have searched the garmin forums and FAQs for an answer without success.
I am waiting for a reply from garmin tech support but at this rate I think I'll just have to buy another GPS. After owning an etrex, two g12's and buying three g72's for my work, plus a garmin marine sounder, I'm really disappointed with the nuvi255. Might be time to change to a tom tom.
It has been working properly for several months but today when I turn it on before finishing of uploading maps, it turn off suddenly and then it repeat the same loop once and again....
I´ll try to contact Garmin support to find out how the solution...