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In Reply to: Update: the plot thickens... (more) posted by Lon on July 16, 2000 at 23:56:48:
Furthur playing around led me to this: in menu 19 that isn't an "I" in the display, it's an "L" - for LOCK. The on/oFF toggles the ability to access the other menus (3 to 21).
Here's how it works. As the menu 19 display is changing back and forth between on and oFF, press the button quickly while oFF is displayed. You will get a display that says:
teSt __0._
VERY QUICKLY press the button again and you will advance to test menu 1, and if without pausing there you repeatedly press the button again you will advance through the menus again, but now you can pause at menus higher than 2 and fall into those menus (by pausing there until the display chnages). Some have a couple or more sub menus. With two exceptions all are so far meaningless numbers (some in hex, and some show slight oscillations). The two exceptions are menu 13, which if you drop into it and press the button produces a gong sound, and menu 21 which says 'reSet'. I don't yet know what it resets, but if you press the button while it is displayed it drops you out of test mode.
If at any time you drop out of test mode while unlocked you become locked again and have to revisit menu 19 and unlock again.
If any 540 owners are reading this and see any similarities with what their system does, and can furthur explain what some of the numbers mean, please post what you know.
Thanks,
-=( Lon )=-
-=( Lon )=-