With the TV off, unplugged and having cooled down for at least on hour (you can force it to cool faster see the manual), take off the front cover. Grip it from both sides and pull it away from the TV. Loosen the screw that holds the lamp cover and remove the cover. Next loosen the screw that holds the lamp in place. Pull the lamp out slowly by the handle. Handle the new lamp with a cloth to avoid oils and dirt getting on the lamp. Put in the new lamp making sure to properly align it in the TV. Retighten the lamp screw and then put on the cover and tighten its screw. Replace the front cover. If the screws and lamp cover are not correctly positioned, the TV will not work (a protective circuit is involved).
Next reset the lamp time (instructions should have come with the replacement lamp). Wait until the lamp notice disappears from the TV screen. Press and hold the Vol down button on the TV while pressing the Split/Play button on the remote. Hold both buttons until you see a notice that the lamp time was reset (about 4-5 seconds).
For a download version of your manual, see
http://www2.panasonic.com/consumer-electronics/support/Televisions/LCD-Projection-TVs/model.PT-50LC14 .
I hope this helps.
Cindy Wells
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