It sounds like the ballast may very well be whats causing the lamps to fail. I would try replacing tha ballast.
Replace the lamp thermal sensor. It keeps the fan running (after the set is turned off) until the bulb has cooled down. It's a un top of thesmall cream colored rectangular piece with a short lead wire comming out of one end. It's on top of the air tunnlel lamp housing.
SOURCE: How long does a lamp/bulb of a Toshiba DLP 46HM95 46 in last?
Your bulb may be blowing because of airflow issues or power cycling issues, first does your outlet get switched off at any point in time? if so you may be killing the bulb before it cools, if you turn the set on/off alot and or restart it after off quickly this could lead to permature bulb failure, if the original lamp was not replaced with a proper lamp to match the ballast it could blow the bulb. If your tv is too near a heat vent or the airflow thru the set is not adequate it could blow the bulb.
SOURCE: WD-52525 Lamp failed 2x in 4 months..is it the Lamp?
Having the same problem with the dim picture on my WD-52525. Had the lamp replaced and still had a dim picture. My authorized dealer has been in contact with Mitsubishi Tech Support and they are thinking it's the optical engine (light engine).
If you think the replacement lamps are expensive, wait till you see the price of the optical engine. My dealer told me they run around $750.00! If this is the problem, I'm hoping they will cover it under warranty as the TV is less than 2 years old.
SOURCE: Mitsubishe wd-65732. Air flow problem.
There is an access panel on the side of the television the air filter is behind that panel with the air vents
SOURCE: WD-52525 Red lamp Indicator
usually with that model when you get a 34 eror code for lamp abnormality, its directly related to the capacitors on the Power Pwb. You can get the V26 Power PWB repair kit at the following link which repairs that issue. It contains the replacement High temp capacitors with the board location numbers and PWB identification as well as the service manual on CD. Heres the link its under their repair kit ctegory.
http://servicemanuals.vstore.ca/
SOURCE: Need to replace ballast on mitsubishi wd-62526
I replaced my own the part cost $109,it was somewhat time consuming since taking the back panel off was a learn as I went.However I still didn't get the red LED to go off.....TV still would not power up in it's normal fashion.Previously I had 2 lamps burn out,and you definetly could tell they burned out.Since then I have changed the power supply feeding($130) the ballast circuit and I still haven't got the TV to come on without defaulting to the red LED,and taking the chasis apart to do this was a real pain.I have posted a question about my problem recently.Still waiting for a solution.Mitsubishi won't sell a customer any parts........they want you to go to atechnician that works on their product.GOOD LUCK!
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