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 After 3 hours on the phone with garmin tec support they finally told me to ship it to them and they will send me a new one. thanks for your replies.

 I have a garmin etrex 20 and  I've sent some maps from mapsource to my unit OK but for some reason the topo lines don't show up on my etrex. If I turn my etrex on I see an arrow and the scale, the rest is a blank screen. How do I get the topo lines to show up?

thanks for the help