Do you mean the big encoder knob above the cursor keys?
Its should be a fairly common encoder pot.
If your in the states have a look at http://www.mouser.com/
Shouldn't cost to much.
Ticky bit will be getting the old one off cleanly without damaging the
solder pads. Can be done ok though.
--- In xl7@yahoogroups.com, "diggs0110" <diggs0110@...> wrote:
>
> Does anyone out there know if this can be fixed , if so where should
I
> look and around how much will I spend. the unit still works just
can't
> navigate. The unit fell off of its stand breaking the knob leaving
the
> stem of the knob stuck in the unit
>