Question about Panasonic PT-47WX42 47" Rear Projection Television

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Powers on with 'woodgrain' on picture

When set is cold the picture has a 'woodgrain' effect, that changes pattern as the set warms up. It would take one to five minutes to go away, now it's up to 30 to 45 minutes. Any ideas? I've tried all the video settings, and the convergence looks good.

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  • Nimbi63 Dec 16, 2007

    Took to repair shop, said he took signal board out of 2nd TV and put in mine, and the picture was great. Claims components cannot be replaced on the signal board and will contact Panasonic for price of new signal board on Monday. Also said there is a place in Ohio that rebuilds Panasonic boards which may be cheaper. Any comments or sources of signal boards?

  • Nimbi63 Mar 29, 2008

    On my original board, I found if I used component cooler spray on the front convergence chip, the picture would look good for a second or two then go back to the lines across the screen. I pulled the signal board and resoldered the convergence chips, and the lines across the screen are consistant now (before, they started far apart, and got closer and closer as the set warms up. When prob first started, after five minutes warmup the picture was good.)
    I ordered new convergence chips and changed both, The picture is slightly better, still has lines, but after 30 to 40 minutes, the set shuts off with the three blinks of the front panel red light, indicating convergence circuit problems. Should I replace the resistors, or ?? By the way, after resoldering the convergence chips the first time, the circuit cooler spray had no effect on the picture.

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Possible clod solder connections ,which is why the time factor,it will only get worse as time goes on ,requires repair soon of other problem may arise .

Posted on Sep 08, 2007

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