Howdy partner,If your tv is between 4000-5000 hrs of usage 1-2 yrs old and picture is going dimmer and dimmer then its time to replace the bulb.This is the part number your tv uses : 915P043010.I was able to find it on ebay Get the Philips since they normally last 2-4 yrs 6000-8000 hrs.Have a blessed day partner.
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