How do I reset the lamp timer on a sharp XV-PN300 Projector?. I haven´t the manual?

Answer 1

You can try to download the manual from the Sharp web site. I have a Sharp projector (not the same model), and the procedure is this:

Projector power off

While holding down "enter", "down arrow" and "right arrow" on the control panel, turn power on.

Answer 2

Not familiar with that particular model but the Sharp's that I used to work on in the past required you to hold down four buttons while plugging in the power. I think it was down, right, menu & enter. Its something like that. You need to hold all four down while plugging in the power cable. When you get it right the projector will turn on without you pressing the power key if I remember correctly.