Question about Philips Magnavox 51MP392H Rear Projection Television

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Color lights show thru screen

Magnavox 46" rear projection tv. After moving from one location to another the three color lights reflect off the mirror and shine thru the screen. Can see the picture barely but lights are very bright.

Please someone help!!


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Re: color lights show thru screen

Check for loose wires and check that all the connectors are tight.

Posted on Jan 17, 2008

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What is causing white vspots on my tv?

As you probably know, your DLP (Digital Light Processing) TV works by projecting Red, Blue and Green light from three LEDs or a color wheel depending on your model, onto the DLP chip which contains rows of thousands of tiny mirrors. These mirrors reflect the colored light through some lenses and other fixed mirrors and onto the back side of the big frosted plastic screen on the front of your TV cabinet. In the neutral position, these little mirrors don't reflect any light onto the back of the screen. If they flex into a certain position they will reflect any light from the three LEDS shining on them. What color depends on which LEDS are on at that moment. Each one of the mirrors is roughly equivalent to a pixel.

Any mechanical thing will eventually fail and if any of these mirrors fails in the OFF position, then no light will be projected to that mirror's target on the big screen. You are not likely to notice one "pixel" on your screen being dark though. However, if any of the mirrors fail stuck in the in the ON position they will continuously reflect all three LEDs light to that mirror's target on the big screen. This little white dot is noticeable and your attention will constantly be drawn to that stuck mirror's white spot. Once one mirror fails it is only a short time before more and more mirrors stick in the ON position and you see dozens then hundreds of white specs. It's VERY annoying.

Fortunately, if you are fairly DYI handy, it's not a big job to install a new DLP chip (or LEDs for that matter) into your DLP rear projection TV. Do a BING search on the internet for the make/model of your TV and something like "how to change the DLP chip" in that make and model. There are plenty of YouTube videos on line that make the procedure very clear. If after watching the video you don't understand the procedure, that's an indication that you shouldn't attempt it. I've replaced two LEDs and the DLP chip on my Samsung 65" TV. That might seem like a bad thing but if you consider that the TV was 7 years old at the time and these seem to be the only parts that fail, it was worth it to more or less make the TV like new again. When you search for the parts, watch out for sellers with low part price but ridiculously high shipping cost. I found that had the best price and shipping times for these parts.

Aug 20, 2014 | Samsung HL-S5087W DLP TV

1 Answer

My tv screen when on turns yellow then after a while it will switch back to normal colors what can be wrong with it....

Televisions covered: all Projection with yellow picture, but not Projection TVs with a yellowish tint surrounding objects in a nearly normal picture.

Yellow = red + green
normal picture = red + blue + green (RGB). See illustration.


Fig. 1 Additive color mixing in an RGB monitor, or RGB Projection TV.

The circuitry powering your blue output, or the blue light engine itself is starting to fail.

Operating Theory:

The lamp module shines a bright light into the optical unit; there are a series of lens and baffles, and at the top of the light engine, a lens puts the picture into a mirror which is reflected onto the screen; All video and color is processed thru the light engine. Blue most commonly fails first, leaving a yellow picture.

Dec 26, 2011 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

No colour in bottom right corner

I believ you have an issue with the optical block on your set. Light produced by a high-intensity projection lamp enters the optical block and is split into three paths (one each for red, green, and blue) by a series of lenses, condensers, mirrors, filters, and/or beam splitters. Each color has an LCD assembly with polarizing filters and a liquid crystal microdisplay panel (approximately 1" across). On Sony's "3LCD" models, the light is transmitted through each LCD panel, and, on their "SXRD" (Silicon X-tal Reflective Display) models, the light is reflected off each SXRD panel. Finally, the three separately colored images are combined with a special prism into the final full-color image, which is then projected/enlarged onto the back of the screen by a projection lens.
The following annotated photo shows various parts on the optical block of a 2004 3LCD model KDF-55WF655 (note that the LCD panel cover has been removed):
Either the block is starting to wear out or you have something blocking the lens, such a dirt or something has fallen and is blocking the lens

Feb 20, 2011 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer


This is a DLP projection tv. In it the image is generated by reflecting the light from the bulb on a DMD chip - a chip with a million tiny mirror that are individually controlled. When a mirror no longer works it reflects constantly all the light it gets , so you end up with a white spot on the screen. This is unfixable, the entire DMD chip will have to be replaced at a great cost - the chip itself will cost you less than $200 but the install and adjust procedure is very complicated so an experienced repairman will ask you at least $250.

Feb 11, 2011 | Samsung HLP4663W 46" Rear Projection HDTV

1 Answer

I have a 46" magnavox projection screen tv that has the red, blue, green colors on the left side of the screen when first turned on. After a few minutes of being on, the screen resumes to normal colors. ...

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.
You can get a repair kit with parts and instructions from

Sep 23, 2010 | Philips 60PP9352 60" Rear Projection...

2 Answers

Why the white spots on my tv screen. started with one, then two and now up to 9

the reason this is happening and the problem is getting worst is because the DMD board is starting to go bad some of the micro mirrors are getting stuck on the on or off position and the problem is only going to get worst if you want to fix this problem you need to replace the light engine here is a link that will teach you about this projection works

Jun 12, 2010 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

My Tv has red light (color) out of focus..I've tried tuning the lance but it's not the problem in the's something else..don't know you?

Your TV has three picture tubes which are aligned to properly converge the projected light beams on the screen. Each picture tube projects a single color of Blue Green or Red. During production your TV was carefully adjusted to properly align these colors. As a feature you have the ability to adjust these colors.thats called convergence.If you don't have a manual to show you how to adjust you can find one here

Mar 03, 2010 | Mitsubishi WT-46809 46" Rear Projection...

1 Answer

Screen has green tint, it is an LCD 42 inch

First of all, that is not an LCD tv. It is DLP, which is a common mistake because the picture is very similar. DLP tv's use a high-power lamp that reflects light off of thousands of tiny mirrors into a spinning color wheel which gives the reflections color. Each little mirror is one pixel, which can be any color depending on the hole that it goes through on the color wheel. The color wheel may be spinning slower than normal, which could make all of the light go through the green filter on the color wheel, and give your screen a green tint. Have a trusted mechanic take your tv apart and dust the inside. If that doesn't fix it, you may need a new color wheel or bearings for it (that help it spin). You should not pay more than $200 for a bearing replacement on this tv.

Thanks for asking.

This pic might help your understanding.

Feb 28, 2010 | Panasonic PT-43LC14 43" Rear Projection...

1 Answer

Seeing the blue green and red lights through the screen

I hate to be the one to say it, but it sounds like the mirror broke in transit. I've had several where this happened without the person handling it noticed, or at least said they didn't. Usually on a 51" magnavox you must first have a star driver or a star bit. For some reason they decided to change from the standard when building these. First, pullthe screen saver and frame towards you with both hands. There are clips that hold it in place and it will pop back in place easily. Then remove all star screws around screen frame and slide out carefully. Screen can slide out of frame so hold on from bottom and top. This will reveal the tubes and mirror. Most screens and mirrors are 100.00-300.00 so use caution not to scratch anything. Good luck, Russmann.

Jun 23, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Adjusting colors on a magnavox 46" projection TV

Replace the CRT fluid. It grows algea in the blue and green only. 9.99 from MCM electronics.

Oct 19, 2007 | Philips 46PP9302 46" Rear Projection...

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