Reset hour meter for replaced lamp

push and hold the PIP (same as play) button in the remote control
push and hold the menu button on the front panel of the tv.
Do both actions simultaneously. Of course you have to be close to the tv to do this: pointing with the remote at the sensor AND holding the menu button of the tv panel.
Do this for some seconds and the screen is going to tell you the timer was reset sucesfull and ask you to push exit in the remote control to finish

Hi I have a panasonic tv pt50lc14 you change the bulb and one seconds and then turn it off