Bushnell v2 fix?

[ballplayer002003]

So I have an old Bushnell tour v2 range finder that has worked beautifully for years.  The past few rounds the yardage has been waaaay off.  I have changed the battery and cleaned the outer lenses, aside from this, what else can I do?  Anyone else have this problem?  Please don't say get a new one, I know it's got some age to it but I want to exhaust all possibilities before I do.

[DawgDaddy]

Call Bushnell, they may have some suggestions.  My Tour X suddenly quit working, they gave me several things to try but none worked.  I was offered a discount on the new XE but I have to wait until May to purchase it, they are concentrating on getting all of the current units into stores right now and the technicial can't give the discount until then.