Ah Geoff, you should get some answers here. Mine is buggered too. Wont read over 27knots

Very funny guys, but remember I will be back.

Thanks for the info Mike,but have tried both of those things, I think I will wait to we get back to England before I try and get it fixed,it has been great sailing over here in Dahab just a pity about my GPS.

I had an old one that did this - wouldnt turn on, but when plugged in worked fine.
In the bottom of the last menu it tells you what the battery charge is, mine was fine. As soon as unplugged it would turn off. I spent a while talking to locosys who were really helpful, in the end they offered to repair it but I could buy a new one for hte cost of post over there and return along with the repair costs so I chose to get a new one (two in fact as I lost out on a great session and didnt want that to happen again). Mine was 3 years old and had been in a leaky aquapak for all that time. Now I will only use it in a bag inside the aquapak as all the screws had rusted up on the old one.

Try plugging it in and turning it on. If it is the same as mine then let me know on here and I will forward you the email address of the guy I was speaking to at locosys.