Hard to say how much longer the lamp will last. Most lamps have a factory live expectancy of about 3,000 hours. They program the tvs with a timer that lets owners know when its close to that time. Depending on how often the set is used will affect he lamp life, if played for 5hrs a day the lamp may last longer then if its played 10hrs. When the picture gets dim or causes the set to shut down is when its time to change the lamp. If you remove the lamp and the reflector (mirror), the element has white spots or is misshapen is when they should be replaced. There is usually a lamp timer and a way to reset the counter in the menu options. Check the owners manual for instructions.
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