Question about Toshiba 55H70 55" Rear Projection Television

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I have a toshiba model tn55x81 and i get sound but no picture

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The tubes could be shut off for a number of reasons- no 200 volts, no filament voltage, no high voltage.

set will also blank (cut them off) if a vertical or horizontal deflection problem---

things would have to be tested for voltages etc to see what the issue is.

Posted on Nov 06, 2012

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What powers the picture tubes in a 55 inch model tn55x81


The tubes in the projection set among other things need: 200 volt screen source, filament voltage and high voltage.

Note that if set for example has a loss of vertical or horizontal sweep this will be detected and the tubes will be shut off to prevent the tubes from getting a burn mark on their screens.

Nov 06, 2012 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Tn55x81 T.v. turns on and no picture, but has sound, when t.v. turns off, blue flash follows, sound appears to be fine and no picture, not even when I change to standard channel. Fuses appear to be fine.


Hi you have asked me to mail the transcript but I do not have your ID. So please send me a mail to goodwise24@gmail.com and I will send you the transcript.

Jun 02, 2011 | Toshiba Televison & Video

1 Answer

Red color is off alignment. Picture is blur. how to re-align color on TV?


Sounds like a convergence failure, here is a tutorial I made:
http://www.fixya.com/support/r5001731-convergence_diagnosing_convergence
Let me know if I can be of further assistance.

Sep 09, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 06, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

I have a Toshiba TN55X81 that has sound but no picture. Turned it one one day and no picture. I don't see any error code blink when I power on the set.When the set is turned off a line flashes across the...


It shouldn't be the convergence chips. You may have blown a pico fuse on the power board.
You should be able to safely remove the convergence IC's and try the tv without them as they only do image correction.

Oct 13, 2009 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Blue convergence


They should be STK392-110 ICs you can get replacement ICs at the following link with free instalation instructions
http://servicemanuals.vstore.ca/

Jun 04, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Broken Mounting bracket Toshiba TN55X81


new braket hard to get on this model i loked all over i would use e poxy like u said should be fine

Feb 03, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Toshiba TN55X81


Blue Convergence IC is bad = change both for reliable repair..
located on largest heatsink on chassis.............T.

Feb 02, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Toshiba TN55X81


What's the model number, the TN55X81, or the 51H84?

Jul 24, 2007 | Toshiba 51H84 51" Rear Projection...

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