Great thread! I'll follow ffrlr's advice and check my internal uSD for corruption. Linux won't mount the 2nd partition (3.09G) but can access the first (31k) but windows will. Both have a GARMIN folder but the 2nd has many sub folders. Ill try and replicate the data onto another uSD card internally as my unit has no system icons within NAV, only a random car on a white background with N and 0mph shown. If I hit the split screen, I get some more detail on the map but it reverts to blank when I leave split screen. All testmode functions pass (reset holding TEL and Eject) except TMC which seems to be a radio function but I do see station ID when scanning and it reports 3 maps not loaded: base, detail and junction but shows a North American map as first entry so 3 of 4 are missing. Reloaded GE a few times. It does download updated map but still no base,detail or junction. Will work on it again tonight.