Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Jvc av-56wp74 power up failure

Sitting here watching tv and a click-pop-fizz sound comes from behind the tv.  Now power light blinks on with no picture or sound.  After removing the back plate and listening it sounds like it is coming from a little black box (fuse maybe) on the right hand circut board towards the back.  I cannot simply remove this box as it appears to be soldered in place.  A few minutes after putting the backing plate back on and applying power the tv power light came on but nothing else is happening.  So as of now  have a power light steady on and non-responsive to any inputs

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  • hwkdoc Oct 15, 2007

    Shuttle83 any ideas on how to obtain a schematic or repair manual for the jvc av56wp74



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Hello hwkdoc,


What has happened is that your shutdown circuit relay has tripped and it looks like it also may have malfunctioned. This however is not the cause of your problem but a symptom. The cause of your problem is an over-current condition caused by one of the systems in your TV, I would suspect the high voltage power supply or the switching low voltage power supply. These are the first places to look, if they are not the problem then check the convergence correction amplifiers. Right now the shutdown circuit is keeping the TV from coming on. If you do not have a background in electronics I would advise you to have a qualified TV technician analyze and repair your TV.


Thank you,



Posted on Oct 15, 2007



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