First things first, I'm not a bloke so I know I shouldn't really be here, but I need your expertise please.
We have a Navman 510 (and could tell you a funny story or two about the weird and mostly dangerous routes that it has taken us).
1st problem was a faulty memory card that I replaced with a mini mmc card and it worked fine for a few days. We were travelling the other day when the screen went blank, voice still instructing us but we couldn't see anything. Now it seems to be dead as a door nail, any advice please (it's out of its warrantee), thanks fellas!!!