Question about Toshiba 53HX71 53" Rear Projection HDTV-Ready Television

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Help Screen flutters on startup, piccture settles down approximatly 10 minutes later. and a blue arc appears from the bottom left to bottem right. Blue shadows on lettering and pictures.

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Re: help

What are these convergence IC`s and any burnt resistors, my tv is doing the same but the top half of screen stays that way now. Can you help

Posted on Feb 02, 2008

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Re: help

Your having convergence circuit problems, you`ll need to change the convergence IC`s and any burnt resistors in the convergence circuit, if you have questions e-mail me back, good luck, BMW Rider

Posted on Jan 04, 2008

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Horizontal blue line at bottom of my screen, on my 60 inch lcd wega, was about 2 inches from bottom of tv now it's like 3 inches from bottom, blue line is about 2" high all the way from left to right...

The "optical block" is bad. There are currently 3 settled class actions against sony for other models with the same problem, If memory serves me correct, your model is in an ongoing class action. If you google Sony LCD class action suit. you will find lots of info. www, and support has a few articles as well. It is a 900.00 part, so, not really cost effective to repair. Post a comment for me tomorrow and I will paste what links I have on this issue to this post. There in my other PC at my office. Hope this helps

Jan 14, 2011 | Sony Grand WEGA KF60WE610 60" Rear...

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When tv is turned on, in about 10 to 15 seconds the screen goes blue. If the tv is turned off, then turned back on, the picture is fine for about 10 seconds then back to the blue screen.

This is simple--this model is prone to bad picture tubes--blue is most common--screen goes bright blue and set shuts off--set is detecting too much current being drawn--forget replacing the tube--very expensive as only available on rebuild basis.

Here is what to try:
1) you need to remove entire plastic grill under screen--held in one of two ways--either several screws on back on either side or two screws at bottom front under caps.

2) With it free, pull up from bottom and tilt entire grill to the left--the front controls are mounted in it and you will need to undo some ties that hold it to get it out of the way.

3.) Grill has tabs at top that tuck in and you lift it from bottom.

4.) Remove small inspection plate behind grill--a few screws.

5.) Directly behind grill you will find a square black plastic block with 6 shafts (they are controls) One row left to right will be marked Focus--do not touch those. The other row will be marked screens. Look closely (green is the middle one) as each will have r,g,b in small black letters.

6.) In your case LOCATE THE BLUE SCREEN CONTROL. Best way to do this is take set to unused video input and turn blue SCREEN down (usually to the left and less than 1/4 turn) until the blue just goes away---on blank input you should only see VIDEO 1 etc in green.

Do not turn down too much--just enough so blue is not there--no blue background or curved lines.


You only have seconds if the set is shutting down, Once you get the blue down enough set will stay on.

Take to regular channel and with color all the way off--you should have a black and white screen, adjust just a little if needed.

I have done this many times and most get another year or more out of the set--if one of the tubes is causing this (very likely) sooner or later it may get worse and return to the point where adjusting does not help--when this happens replace the set.

If this has told you something that helps you or you did not know rate this solution as very helpful as I do this here for free.

If you have questions let me know BEFORE you attempt it.


Aug 19, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Blue arc and ghosting across middle part of screen.

Replace Both of your convergence ICs they are big Black ICs will have STK on them! Use STK392-150s or the 180s Better ICs Call Mats Electronics 1-800-628-1118

Dec 21, 2009 | Pioneer SD-533HD5 53" Rear Projection HDTV

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Screen fades to blue.

The Blue SCREEN setting is too high. These adjustments are located inside the TV behind the front panel. There are two screws behind covers and then a wooden panel to remove to access the adjustments. The leftmost set are for BLUE, the middle are GREEN, and the right are RED. The top row are FOCUS and the bottom are SCREEN. Focus will focus/unfocus the tube and Screen will adjust the power of that tube (there are 3 tubes, one for each color). If Screen is adjusted too high, horizontal lines will appear (my TV had red lines, but I played around with the knobs and saw that it could happen on any of the colors). Additionally, if SCREEN is set even higher than that, the tube could go so high that it turns the whole screen that color (in your case, blue). If this happens the TV will shut down, probably due to either overheating or overvolting. To fix this issue, turn the appropriate SCREEN dial down until the lines go away. In your case, you want to turn the lower left dial down. Don't turn it too far down, if you turn it more than necessary the TV can give you an AKB error (noted by the STANDBY light flashing a sequence of 5 blinks).

Apr 02, 2009 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Screen slowly turns blue...

I had blue lines showing up on my screen, then the other night my screen started to flutter the blue, bright to dim and back. So I followed this link to resolve the blue lines and the blue flutter was resolved as well. Hope this helps.

Jul 26, 2008 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Toshiba 43A9UE convergence problem

Check the resistors right next to the Convergence ICs often 1 or 2 of them go oen when the ICs fail.

Feb 09, 2008 | Projection Televisions

1 Answer

Blue color is out of position

sure sounds like convergance problem

Convergence amp ic bad

Jan 30, 2008 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

Hitachi53SDX89B color problem

Blue convergence IC bad...have both IC's changed..insist on
STK394-160E upgrade part # CZ 01341 Hitachi brand.....Original part is STK392-110......Also, check B+ feed resistors next to
convergence amp IC's for burn / damage...after rebuild, press magic focus.......................T.

Dec 21, 2007 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Blue Convergence Problem

This is a pain and you have to be carful in doing this fix. Its basically the bulb thats shot, its got that liquid in it so DO NOT BUST IT OR YOU WILL SCREW THE BOARD UP! THen you have to get a new TV

Oct 26, 2007 | Philips 46PP9302 46" Rear Projection...

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