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Does the green power light stay on? if you wait a while, it may flash and turn Off again, perhaps.
Does the red standby light turn On at all?
How old is your projector?
A reset may not apply to this, but a reset can be done by pulling the plug on it and allowing it to cool off, unpowered, for a half hour or longer.
The power light staying green, may mean either a short or an overload has been detected.
Try reseating the lamp bulb in its socket. Also, note whether a cooling fan inside the projector turns On at all, or not. If it doesn't, there might even be a fan failure.
(I am presuming that the lamp bulb never lights up. Correct me on this if it actually does.)
Oh. I didn't ask you to remove the battery.
Do you mean a Lamp Runtime reset?
That is the only reset Panasonic projectors do, as far as I know and can find out.
Not altogether I don't think. Try and consider what I suggested, it might help.