Ttn3 Jornada Compact Flash

I have a Jornada 540 using TTN3 and Viking 256 cf Card my problem is this. The basic software Navigator, Wizard & GPS in the main memory. The map has gone onto the cf card. The problem is Navigator will not read the cf. It worked fine using this set up with Citymap, the cf was made in Tiwan. Thanks

[Charlie]

Try a different brand of memory card, or try your Viking branded card in another Jornada 540.