Question about Mitsubishi WS-55805 55" Rear Projection Television

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Mitsubishi 55 my tv randomly has black lines that shoot through the tv horizontally. It is a random occurance that sometimes will go on for a while, and sometimes it wont happen for days

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  • 59 Answers

Your DMD mirror bracket may be loose, screws may just need tighten down or a pin may be missing in the bracket too. If it is not the bracket then you need to replace the DMD board itself.

Posted on Mar 23, 2008

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Posted on Jan 02, 2017

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I have a 55 inch Samsung LED TV that has horizontal black lines across the screen from top to bottom that jump randomly up and down. I need to know which board is bad.


You must do testing as outlined in the factory repair manual by symptom to diagnose this, if it was easy TV repair shops would be out of business.

Oct 28, 2016 | Samsung Televison & Video

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My Sony trinitron tube Tv 36" seems to be going (its 10 years old


no ....the tube will end up after 20 yrs in 10 yr old sony...
it is worth if u fix it. randomly going black means...horizontal driver trans former is the problem..or any loose contact with the 110 volt supply to that transformer,,or any loose contact with line o/p transformer.. (horizontal driver transformer may be gone
then tv behaves like this) if any other parts gone tv wont come back.... there may be a loose contact call a service pro..

Apr 02, 2010 | Sony FD Trinitron WEGA KV-36FS120 36" TV

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Mits WD-52525 random 1-pixel jitter


if you are a profetional replaced all capacitors on FMT and DM board.. or replaced the chassis........

DM and FMT board N/L/A .........

Jun 17, 2009 | Mitsubishi WD-52525 52" Rear Projection...

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Vizio 42" LCD - Random appearance of small black rectangles


There is a processing fault that is starting to occure. What you are seeing is a type of aliasing. This can be in the main signal processing or in one of the control areas.

The set will require service. The service rep will test the set by using board substitution. There are typicaly a number of areas in the TV set that can cause this type of fault. Once the defective board is located the fault will be easy to service with a simple board swap and some adjustments.

If the set is out of warranty, it may be expensive to service. With many of the no-name brands, spare parts can be difficult or impossible to have.

Jerry G.

Jan 02, 2009 | Vizio L32 32 in. LCD HDTV

2 Answers

Many thin black horizontal lines on my Hitachi Ultravision 50" TV


Good Day, LDS also;
You may have a poor seated cable connector. Unplug TV from A/C, remove back look for a large black connector. It connects between the Main Digital Module and the Drive PWB. Re-insert both ends several times to make better contact, use contact cleaner if have but not always needed. Good Luck, big IRISH.

Jul 21, 2008 | Hitachi UltraVision CineForm 55VG825 55"...

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Blue lines


DB-IF IN FACT THE PIX IS GOOD ON OTHER INPUTS THEN YOU MAY HAVE A BAD FORMAT PCB.IF THE LINES ARE ALSO ON ALL OTHER INPUTS YOU PROBABLY HAVE A DETERIORATING POWER PC BD. PROBABLE COST OF REPAIR 350.00- 700.00.JOE TV

Oct 11, 2007 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Shooting mode will not operate


Your camera has a defective CCD imager. Please return the camera to Canon in New Jersey and they will replace the CCD at no charge to you. This is a known issue and should be covered under extended warranty. Good luck my friend. Joe Weibel customelectronics.org

Feb 27, 2007 | Canon PowerShot A75 Digital Camera

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