Getting white flashing screen when using power cable

 

Has anyone expirienced this? My 255W has been fine and has not seen much use in the 2 months I have owned it. As soon as I plug in the unit I get a white screen flashing with the garmin splash screen in the background. It seems to sometimes stop and work if I press on the screen. Other than this it works OK. It did the flashing white screen once on battery, but that has not been replicable.

Any ideas?

Thanks!

--
Matt