Question about Mitsubishi TS-5545 55" Rear Projection Television

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Black horizontal lines

Recently, groups of "cycling" black horizontal lines appear on the screen on all inputs. There is about a centimeter of space between each group of horizontal lines. The lines go from barely noticeable to obvious and back in a continuous cycle, and seem to move up the screen, then become momentarily stationary, move down the screen, and finally back up again. At first I thought it was some sort of outside interference, but now I believe it is some sort of "scanning" issue.

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Re: black horizontal lines

Sounds as if you have a bad capacitor in the horizontal deflection or video circuitry. You can spot a bad capacitor in circuit with a ESR meter.Hope this helps.

Posted on Jan 17, 2008

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Bulb replacement will only repair reduced brightness or contrast problem. Sometimes shadows or lines (usually curved or circular) appear in the image if the bulb is weak or faulty. This will show with the color turned off and a black and white image displayed.

Most visible color faults are caused by optical engine failure. Big cost, as the complete assembly has to be replaced.

Occasionally there are video processing or tuner problems that require serious troubleshooting to determine what board has to be replaced.

If the fault is not visible on the customer menu and appears only with input signal viewed, you may have a cable box or other signal input problem. Check various input signals to see if the problem is visible with all inputs.

Running the channel scan with vhf input signals sometimes clears up a lot of problems. Your cable company may have changed or adjusted rf modulators or other equipment and the tv needs to be aligned to the changed signal. Auto tuner scans will take care of these problems.


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You just need to have the lenses realigned and the red shading will go away.

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just in case you came across this - it is the light engine! $950 - thanks mits for complete junk

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Does it look like a 3D image?
Would you be able to post a picture of the TV with the mention lines?

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Good Day;
It sounds like you may need to re-adjust your G-2 controls, located at front, remove front panels. Look for small block with screen /focus controls on item, first turn color down, reset brightness, contrast controls. Adjust until lines are at min. and picture is a good black and white (grays). Good Luck, big IRISH.

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I had the same problem with our VS-55705 Mitsubishi. It seemed to me that this was a problem of heat.

I unplugged the TV and then took the cover off of the back of the it. I then used canned air to blow off the collection of dust from the components. Then I vacuumed as close to everything as I could without touching any of the components. I then used glass cleaner to clean up the surface of the three bulbs.

I plugged in the TV and it has worked perfect ever since. I haven't put the rear cover back on it yet. That could have been all that I needed to do to fix it. I'm too busy enjoying a nice picture to try putting it back on. Cleaning the bulbs really helped the quality of the picture.

Good Luck!

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Your problem is a bad main filter, a regulator IC ,and or a combination of a convergence problem along with a vertical IC going bad. This set is not something you should mess with unless your a trained tech. Please seek a pro to assist you with this repair. good Luck

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