A TV projection lamp can give you thousands of hours of trouble-free service, with higher-end models clocking in at up to 8,000 hours on average. To keep them running for the full lifespan requires regular maintenance of your TV and optimal usage conditions. But sometimes, even when you do everything right, your lamp may develop problems that can hasten its failure. To prevent this from happening, you should be aware of the common symptoms that point toward failure and some solutions that may delay that failure point.
Failure to Light
Your lamp may be working perfectly one day and the next day it may shut off for no apparent reason. When this happens, there are a few common causes, several of which can be easily dealt with.
The most common cause lies with the safety features present in most televisions that use these lights. Many televisions will shut the lamp off when the system becomes overheated. You can fix this problem simply by waiting between five and 10 minutes before turning the TV back on. Take this wait time to look for the cause of the overheating. Look at the vents; if they're clogged clear them with a dry, lint-free cloth. Also ensure that the TV is operating in a well-ventilated area with the vents clear of nearby furniture.
Power surges can cause the lamp to shut down, as well. If there's been a recent power surge or loss of power, wait a few minutes and then turn the TV back on.
Listen to your lamp at start-up when it fails to light. If you hear a clicking sound, it's indicative of a lamp burnout. The clicking is caused by the lamp repeatedly failing to light. In case of burn out you'll have to replace the lamp.
At times your picture may develop problems that can be traced to your lamp. If your TV has developed a hot spot in the image--which is a specific area of the picture that's brighter than the rest of your image--or if the hot spot wanders around the screen, the lamp will need to be changed.
Your picture may dim over the lifetime of your lamp. This is a sign that the lamp has neared the end of its life cycle and it will need to be replaced even though it still projects. Once it begins to dim, the trend cannot be reversed and will soon be accompanied by a loss of image quality.
If none of the fixes help to relight your lamp or if you heard a popping sound prior to its going out, the light has reached the end of its life and will need to be replaced. In the case of the popping sound you may have a burst bulb, which can scatter glass throughout the lamp housing, so handle with care.
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