You can reset your password by using a hidden menu available from the status screen.
Do not attempt to change any other options from the hidden menu.
To get to the status screen, press the Menu button. Then select System -> Status. With the status menu on screen, press the coloured buttons in this order:
red > green > yellow > blue > yellow > green > red.
A 'Hidden Menu' will appear, from which you can reset the password to 0000.
Do not attempt to change any other options from this menu.
By the way did I mention not to attempt to change any other options from the hidden menu?
(Details originally posted on hummy.org by FenderBender. That forum no longer exists)
Neil S
July 2014