Question about Maxent MX42X3 42 in. HD-Ready Plasma Television

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Tv flickers when first turned on. This can last for several seconds to about a minute.

Posted by ca_baby on

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I have encountered this exact same problem with 2 Maxent MX-42X3 Plasma TV's. I found that C766, a 220uF, 16V surface-mount electrolytic capacitor on the main board is bad. This capacitor is located just to the left of the green multi-fin processor heat sink. This capacitor will test good using capacitor meter or an ESR meter, but if you spray it with Freeze-It with the power on, you will find out that this is the problem! To get it out, I found I had to remove the little 10uF 16V surface-mount capacitor just to the left of it. I then replaced these 2 capacitors with regular (radial), high-temperature, low-ESR capacitors. I cut the leads short, and bent the ends out just a little bit so you can solder them back onto the surface-mount pads. You can get these parts from Digi-Key Corp. I used Digi-Key part # P12383-ND ($0.32) for the 220uF capacitor, and P11212-ND ($0.30) for the 10uF capacitor. Both of these capacitors are rated for 25V and high temperature, so they won't go bad again. You can purchase surface mount capacitors there too, but I find them very difficult to solder back into those locations due to the tight placement of other capacitors in that area. Be careful, and good luck!

Posted on Nov 16, 2009

  • apollo13519 Mar 19, 2011

    Are you shure that the cap that you say to the left of C766 is a 10uF C734 on my board it is a 22uF 16V?

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Sounds like you have a loose lamp or connection problem with the back light inverter to Lamp.

Try taking it appart and make sure the Lamps have been inserted properly into it's clips.

Most likely by now it is charred black from arching. Each time this happens the connection will get worse.

Eventually it won't work.

Posted on Aug 14, 2009

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