Question about Toshiba 43H71 43" Rear Projection Television

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Toshiba 43h71 red light

My set blinks and will not turn on some say the convergance ics are bad How do i know for sure this is it any tests that can be done to confirm this ? and where are all the experts to anwser this question ?this web site i9s great when someone anwsers

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Remove ic's is way to confirm..

Posted on Oct 20, 2008

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The tv has red images, I cannot get the red convergence line vertically to straighten, it is squiggly, the horizontal is straight, and the blue and green lines are both okay


the 43h71 has a pair of convergence ics that commonly go bad and cause this problem. replace original stk392-110 with stk392-120. the upgrades have a collector rated at 4 amps vs the 110's 3 amps and should be more reliable.

also know that they hyperboard in this set can cause squiggly lines throughout but will not affect the convergence.

Jul 06, 2010 | Toshiba 43H71 43" Rear Projection...

1 Answer

Tv was blurry them turned off and wont come back on and the red light on front blinks


The blurry must be defined as out of convergence or out of focus,If there is a lines of color on the pictures edges, its convergence, if the picture is not sharp the focus is the problem.The common cause of convergence problem is the convergence drive chip(stk) and might be the cause of shutdown too.The focus problem is commonly contributed by the projector lenses, in most cases the coolant liquid leaks and drip on the board, this causes shutdown too.The lenses must check first for any leak before the replacement of IC(stk).

Sep 23, 2009 | Toshiba 43H71 43" Rear Projection...

1 Answer

43h71 flashing power light


Remove ic's and see if it fires up..

Oct 09, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Replaced ic chips and still have red convergence problems


convergence resistors they can often be burnt open when the ICs go out.

Aug 12, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Problem with tv


If your Model is Tosh 43H71,then pull chassis and locate F850,
F851 soldered-in fuses...check with meter..if open,replace with
proper value micro fuse(s) and solder jumper wires 008,010,017,
048,600 located on signal board.Replace convergence IC's
STK392-110 with IC's from kit # X 480295 ( upgrade )...........T.

Mar 31, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

No picture or sound


Pull chassis = check F850,851 micro fuses =no good ?
Replace STK IC's called convergence amps = Some special
soldering is needed = let me know.......................T.

Oct 24, 2007 | Toshiba 43H71 43" Rear Projection...

2 Answers

How to adjust red blue green


if ur in service mode already..turn down all drive.green first turn it up until the desired intensity is achieve.then blue all the way until it almost blend the green.u must not see one color either too much green or blue.turn up red now,let it blend until u see a perfect black and white.note:make sure that the color level is set to minimum and tint to center. ihope i help u..

Mar 20, 2007 | Toshiba 43H71 43" Rear Projection...

2 Answers

Vertical Red/Green lines


You have bad connections on the board and need to be resoldered or the convergence IC's are bad. If you know how to solder on solid state elctronics then you can change the IC's or find a bad connection on the board if you know the High Voltage issues when working on a TV set. If you have to training on TV sets I highly recommend that you call a service person to assist you in this repair.

Sep 25, 2006 | Toshiba 43H71 43" Rear Projection...

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