speedo's stopped working?

went out on the bike today and popped into a mate's to say hi.
came back out to the bike and the speedo's now not working, the screen still work's it just reed's 0mhp

any idea's befor i take it to the dealer's?

http://www.superduke.net/forum/viewtopic.php?t=10054

Read this, try/look at the above before you take it to the dealers.