Originally Posted by ferbal
With the Panasonic, you can see the real hours and number of counter resets if you know how to enter in the service menu...
From my understanding, there are no timer electronics in the lamp assembly itself; it is just a dumb lightbulb. The unit "knows" the age of the bulb only because there are micro switches on the pj itself which sense that the lamp assembly has been removed and then replaced.
An unscrupulous dealer could place a small piece of tape over these micro switches (when the unit was brand new and never fired up), and the service menu would then no longer report the true age of the current bulb in use since any swaps would only be recorded in the unit's memory when
the dealer wanted
them to be recorded (he removes the tape).
I never meant to imply there was an easy way to gimmick the unit's overall
odometer, what I meant is that there are ways to falsify the number of hours on the currently installed bulb. Sorry if I was not clear on that.
[I actually thought of an even easier method, but I'd rather not publish it here in an open forum, because if in the wrong hands it could facilitate the bad guys.]