Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television

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Dark shadow on right side of screen

Can't find problem or solution... changed bulb but shadow still there.

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Re: Dark shadow on right side of screen

Replace the pcb convergence board,, It costs $96 and takes 10 minutes to replace you will have to manually line up your convergence afterward as the settings go to factory default. Everyone that owns this set has or will have to replace this part within 3 years
Or Vance baldwin online
Part number bp94-00155a

Posted on Jan 22, 2008

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We just bought a hd tv and it has a dark shadow on screen

Take it back,the video board have prob.Not thing to do with HD,HD only change mode to 1080i.

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I have a 46 Toshiba DLP television

Hi,it does sound like it could be that mirror since thats what direct the light of the lamp.You will need to replace the light tunnel.

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Optoma RD-50 DLP has dark vertical shadow on right side of screen

turning off the main can be very harmful to rear projectors if you dont wait for the cooling off period, for instance when you turn off the tv from the remote, the fans inside are still on in order to dissipate the heat given out by the lamp. as a result some of the lens inside the engine may have burns-in caused by excess of heat.thus leading to shadows on the screen.

hope this helps

please rate me!

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1 Answer

TV has alittle dark haze,not bad,9inchs in from side,top to Bott

Probably the light tunnel. The tunnel is a square tube made up of 4 mirrors glued together.

It looks like this from the side: |_| (with a piece on top too.)
When the glue breaks down, it shifts inside the little mirror holder. The shifted mirrors looks like this /_/ what you are seeing is the shadow of the tilted mirror tunnel.
ON the RCA's there's not a good fix.

RCA's response:
"Ok, well sadly they do not offer the light tunnel anymore, which is what you need. Sadly you would be rendered to get a whole new light engine assembly. That would be the D.N.D module, light tunnel,color wheel,optic spanner, and oci. mirror. Your best bet would be to search ebay2_bing.gif for a broken engine and replace it that ways."

That is the ONLY response I got from them.

I took the set apart and found the 4 tiny mirrors. I will be attempting to epoxy them together. (The set is dead anyway, why not try?)

Feb 25, 2009 | RCA HD61LPW42 61" Rear Projection HDTV

1 Answer

I have a dark shadow down one side of the screen

replace light tunnel = use service manual for procedure....T.

Dec 13, 2008 | Samsung HLP6163W 61" Rear Projection...

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Dark area on screen

sound if u might have what is called a crt burn

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is this a color shadow like convergence problems or just dark?

Dec 26, 2007 | Hitachi 53UWX10B 53" Rear Projection...

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Left side of television just started having a shadowing problem?

I have the same problem and was told by a technician that I need to replace the light engine. Probably around $ 700.00.

Oct 15, 2007 | Samsung HL-R6167W 61" HDTV

2 Answers

Dark shadow

you have defective horizontal linearity! replace a capacitor 200uf 200volts!

Oct 02, 2007 | Samsung HL-R6168W 61" HDTV

2 Answers


jesus have you move that tv thats new to me but surely techman know about.....good luck

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