Hi ive had same problem ive tried a few different things
1) allow at at 30 mins for unit to locate sattelittes(this means turning on the unit & allowing both you & it time to find locations)
2) always use external anntenna & make sure you get the best one these can range from £9-£30
3) oh i forgot try resetting the unit ( there is a little button at the back just use the stylus to re set it)
4) Most important, bin it & get a new Maplins do one for about £70.00 also plays mp3s
Paul F
March 2008