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Installed the lamp, held my breath and pushed the power. Luckily it lit as I decided I would cut my losses if something else was wrong with this TV. Do you know of a site that documents the service menu's for Toshiba's? I can get into it but it really isn't user friendly. Seems to be based on a comp...

Perhaps the high temp limit switch is being tripped by an overheating condition. Have you checked that all your fans are operating and the intakes/ exhaust ports are not obstructed? You could connect a continuity tester to the switch and watch for a break in continuity when the TV switches off. If t...

Pepe, thanks for the URL explaining the anatomy of a Mercury Vapor lamp. I had a close look at the ignition chamber on my bulb and noticed it had a small crack and the interior was a bit black. My last bulb exploded so this is why I was suspecting the ballast when this lamp failed to light. I was aw...

Hi, Got a Toshiba 46HMX85. Bulb failed to light a few days ago. Read everything I could find and took the entire TV apart to check for anything obvious, and because I always wanted to. One thing I'm confused about is the constant mention of a Spark Gap on the ballast. This thing looks pretty solid s...