Question about Toshiba 43H70 43" Rear Projection Television

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43H70 has sound, no picture.

Hello all. I was aware of the convergence problems with this tv before I even bought it. Lasted 5 years before my turn came! I am not a tv tech. I do build, repair and upgrade computers. Not like we did back in the olds now. No more soldering and changing componets. Anyway, I did buy and replace the STK392-110 IC's. No change. System comes on with sound but no picture. After a minute or two, I get a click sound and sound goes off and the red power led blinks slowly. If I press the on and off button again, the led starts to blink rapidly. I have no manual with values for this tv. I figured maybe it has fuses that might have blown along with the convergences? Are they cermamic? Where are they located? I have no clue! Any help would be greatly appreciated. Thanks Sam

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  • SSims921 Sep 13, 2007

    Thanks again Srtech.
    Will check load resistors.

    Sam

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Look in by your convergence ic's for load resistors to feed b+ to the ic;s see if any are opened there usually about 2,2 ohms 2watt

Posted on Sep 12, 2007

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1 Answer

My tv has double color and tthe picture flips then turns itself off.


sounds like a short in the convergence circuit based on model number listed here,
4_18_2012_3_01_20_am.jpg

Apr 17, 2012 | Toshiba 43H70 43" Rear Projection...

1 Answer

I HAVE A TOSHIBA 43H70 I BOUGHT IN 2001 AND THE RED AND BLUE ARE OFF ON THE RIGHT SIDE. I HAVE TRIED TO USE THE CONVERGENCE BOARD TO STRAIGHTEN BUT MY RED WILLNOT MOVE TOWARD THE BLUE OR GREEN. ON NUMBER...


This tv the convergence board are dead.Any colors R,G,B mis alignment,don't matches any colors lines.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts are dead,must be replaced to solved convergence problems.The Shop will cost u $300-350 for parts and labors.

Jul 08, 2010 | Toshiba 43H70 43" Rear Projection...

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Replaced convergence amps, no pic


Go over your soldering and make sure none of the pins are connected by a solder splash.and that all plugs are seated and that no picos are open...

Oct 19, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Blinking red light


I had the same similar problem and through the process of unplugging and re-plugging the set I finally got the set to come on and stay on, then smoke started coming from the back of the tv from a convergence chip. What I found out was that the chip shorted out tripping the tv safety and I overcame that burning the bad chip completely out eliminating the short but with the blue color off. The chips generally are only $5-10 from partstore.com -
 BTW - I think this is one of the better picture quality projection tv's out there compared to my hitachi, sony, and rca and even a friend's mitsubishi. 

Mar 01, 2008 | Toshiba 43H70 43" Rear Projection...

1 Answer

Toshiba 43H70 Picture Problem


Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Jan 28, 2008 | Toshiba 43H70 43" Rear Projection...

1 Answer

43h70 theatherview hd ser 53704921


Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Nov 02, 2007 | Toshiba 43H70 43" Rear Projection...

1 Answer

43H70 43 in. Rear Projection Television


You will need to trouble shoot the power supply and shut down circuits. You will need the service manaul to do this properly , if you would like oe you can get one here at this link for 10.99 and they will email it to you and help troubleshoot your set for free. here is the link if you want the manual.
http://servicemanuals.vstore.ca/

Oct 26, 2007 | Toshiba 43H70 43" Rear Projection...

1 Answer

No Sound, No Picture


loose connection inside i would check the convergence amp area.
Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Sep 23, 2007 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

43H70 has sound by no picture


also check the horizontal o/p transistor for short if ok ,look on the deflection board and see if there are any b+ voltage markings and test with meter for b+.

Sep 12, 2007 | Toshiba 43H70 43" Rear Projection...

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