Question about Toshiba 46H84 46" Rear Projection HDTV-Ready Television

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No picture, sounds fine. Fuse blown

The picture is blank on my tv and it keeps resetting itself as if the bulb was blown. I checked in the back and pulled out a unit that seems to contain the ballast and the bulb, I immediately saw a blown 2A fuse. I changed the fuse, the tv came on and worked for a minute and blew the fuse again. Ballast? Please help, thanks!

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Re: no picture, sounds fine. Fuse blown

This set, I am sorry to say has no bulb and has no ballast circuit. There are three picture tubes inside this TV set. What exactly was the part you pulled out? Can you post a picture of the Part you pulled out?

Posted on Jul 29, 2007

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If you have sound and no picture you either do not have any high voltage, the CRT emitters are not powering up or there is no video drive to the crts. A long shot would be the brightness is turned down but unlikely. The most likely problem is no high voltage. Odds are the Horizontal Output Transistor is open. This is easy to check with a vom if you are familiar with TVs. If not have a professional do it. TVs are dangerous and complicated. If the HOT is open it will need to be replaced along with either/and the flyback and HV divider block. If the Horizontal Output is ok the problem could be just about anywhere. First you need to make sure that all necessary voltages are present and correct. After that you need to determine which circuit or section is not working. At this point the sound is the only thing you know works. Good Luck.

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