Question about Panasonic PT-51HX40 51" Rear Projection Television

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Panasonic PT-51HX40 Rear Projection TV - Dark picture. I have a Panasonic PT-51HX40 TV and the screen has progressively gotten darker over time. I have set the brightness to maximum and tried adjusting the color with no success. I also cleaned the three tube tops. I considered the fix documented for the Panasonic PT-51G44 (replacing the C581 capacitor), but this "D" board has a different layout.

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  • johnsonta Sep 30, 2009

    This model doean't use a lamp, it has 3 crt's.

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Did you checked replacing the convergence ic.its also called the STK ic.its located on convergence board.the number of ic is STK 392 110 .check out.there will be two such ic on the convergence board and both needs to be replaced.this both ic controls the picture.and the cost of per ic is near to $15 you can get replacement ic from -------- www.radioshack.com ------ or ------ www.shopjimmy.com -------- -------------------- this will help.thanks.please do rate the solution.thank you for using fixya.keep updated.

Posted on Sep 30, 2009

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If getting darker your lens/lamp is going bad and is in need of replacing.

Posted on Sep 29, 2009

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1 Answer

Even with a new panasonic bulb;the picture is not as bright as when it was new.prob?


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Tv is to dark contrast it all the way up but its still to dark


trying putting the brightness higher, if it's a rear projection maybe the sunlight coming through the window maybe decreasing the light in the tv.

Sep 14, 2009 | Panasonic PT-51HX40 51" Rear Projection...

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Zenith z44sz80 Dark picture


i have same problem. i replaced lamp but picture is still dark.

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Panasonic projection


Hello joselrivera1,
You have 2 defective Chip.
ed0d659.jpg
Part number: STK392-010
List price $10 each

Best regards
circuitcity


Jun 22, 2008 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Red tinted double image above the normal image.


hello consumer MG,
you need to change your STK392-110. Replacing those 2 chip will fix your set.
c7f2e81.jpg
best regards
circuitcity
www.interactiverepair.com

Jun 08, 2008 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Screen Brightness


Your ballast may not be up to 100% of its rated capabilities, thats often the cause when the brightness level gets to unwatchable levels. You may need to troubleshoot the ballast voltages a defective ballast can usually cause a lamp to loose about 60 % of its brightness levels. The other possibility could be the DLP mirrors need polishing but that is something better left to a repair shop as the DLP mirrors are sensitive

May 02, 2008 | Panasonic PT-43LC14 43" Rear Projection...

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Picture is getting darker and darker


if the tv has never been service before you could have dust on the 3 tubes,this will decrease the brightness to the screen. try taking the front or back off & see if you can see the top of the picture tubes. remember to unplug the tv & to clean spray the cleaner on the colth , then clean the tup of the tube. never spary on the tube itself. hope this works for you.

Oct 22, 2006 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Brightness


You are going to need the assistance of a servicer for this problem,I suggest not to use it until it gets repaired ,shop around for an estimate ,tell them what the symptom is they might tell you about how much it might cost,is hard to tell without measuring some voltages.Be safe and call for help.

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