If you still wanna check you do this...
"If your not sure how many hours
your set has done, liftup the frontflap of the set. hold down the v-
button, whilst holding the v- button, pickup the remote and push the
0(vcr) button 3 times in 1 second intervals. give it a couple of
seconds and it will bring up the service menu. DO NOT F*#* WITH ANY
OTHER SETTINGS, just look in the bottom right hand side for hours it will also tell you how many times you've switched on your set). Once you've noted the hours
used, just push power button on the front of the set to switch it off
or you can also press the EXIT button on the remote . Then when you
switch it on, it will all be back to normal."