Question about Sony Grand WEGA KDF-50WE655 50" Rear Projection HDTV

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Weird Rapid Metallic Popping Sound

While watching tv the other day, the unit unexpectedly went out, after which there was an unusual rapid metallic popping sound, similar to the sound one hears when turning on flourescent lights in an office (or wherever). The lamp indicator light on the front of the unit never lit up to indicate a bad lamp (shouldn't it do this before the lamp blows?). Now, when trying to turn the unit on, all we hear is the rapid popping sound -- there is no audio or video. I'm not sure if the lamp is busted, or the ballast. Any ideas? Is the rapid popping sound normal for a burnt out lamp?

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  • OMMBoy Sep 29, 2007

    Hi! Me again! Just wanted to change the "popping" sound to more of a "plinking" sound. That's all. Thanks for any help you are able to provide!

  • OMMBoy Oct 08, 2007

    After one week of waiting for someone to answer my questions, I've decided to take it upon myself to fix the tv. I removed the front panel and pulled the lamp out. Upon inspection, the lamp was definitely busted with evidence of glass shards within the reflector housing. I've deduced that the "plinking" noise came from the ballast, which was trying to start the lamp. How did I arrive at this conclusion? At my job, we use UV spot-curing lamps. When one of these lamps burns out, the UV-unit continually attempts to ignite the lamp by supplying a 3000V arc to the lamp until it ignites. It does this in rapid succession. The plinking sound from the tv unit is nearly identical (albeit a bit slower) to the sound from the UV-unit. All I have to do now is wait for the replacement lamp to arrive...

  • OMMBoy Oct 08, 2007

    I've resolved the problem on my own (see all comments to original posting). However, I still don't know why the lamp indicator LED never lit up...

  • OMMBoy Oct 15, 2007

    Solved it myself, thank you very much!

  • OMMBoy Dec 01, 2007

    No, the sound actually came from the front of the set where the bulb is located (just left of center). What does an arc welder sound like? Sorry, can't comment on that. But it does sound like you might have the same problem, except that you're still getting audio. If you're confident enough, pop off the front panel and extract the bulb (procedure is outlined in the manual) -- you'll know if it's broken just by looking at it. Good luck!

  • OMMBoy Dec 01, 2007

    No, the sound came from the front of the unit, just left of center. What does an arc welder sound like? Sorry, can't comment on that. If you're confident enough, pop off the front panel and extract the bulb -- you'll know if it's blown (procedure for removing the front panel is in the owner's manual). Good luck!



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I think i have the same problem, but i can get audio still. did the poping plinking sound come from the inside back panel of your TV? it sounded almost like a arc wielding noise?

Posted on Dec 01, 2007


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It sounds like the lamp is definitly bad.
Look at it and more than likely it is broken.
The lamp is located in the front of the set. The bottom front is a cover that has a dial on each side of the back of the sets that can be turned by hand (counter clockwise) holding the front panel in place.
There is a metal strip that is holding a door in place and can be removed.
The lamp is being held in place by a screw that needs to be removed with an allen wrench.
There are several places that you can buy lamps online.

This is a link that this site advertises that has do it yourself instructions: Reply to this post if you have any questions and I will respond.

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