Question about Toshiba 40H80 40" Rear Projection Television

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TOSH 40PW8DB HAS SOUND, HAS EHT, HAS TUBE HEATERS, NO PIC, IF I LOOK DOWN INTO THE 3 TUBES BLUE AND GREEN NOT SHOWING ANY SIGNS OF LIFE, BUT THE RED HAS A SMALL RED WEDGE SHAPPED GLOW, VERY DULL, RED LIGHT ON THE FRONT IS RED ALL THE TIME, I DONT KNOW IF THIS TURNS GREEN, I GOT THE SET NOT WORKING, ANY CLUE! REGARDS MARK

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Could be convergence is simply blown and loading down the power supply... You could try testing the circuit if you have the meters and scope, I'd be glad to send you the service manual just drop me an email...
Bill
premtech@willapabay.org

PS: please remind me of the model number. I get more than 3000 emails a day and I'm over 50 - so I'll likely forget this post two hours from now... :)

Posted on Apr 09, 2008

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1 Answer

I have the same problem(redish screen with no green at all)


Does Tube Light up? with TV on Look down into Tubes and see if picture is clear or you can bearly see picture or not at all Your Projection fliuld may need changing Ive seen where tubes are still lighting but No picture showing inside tube---- Bad Coolant Fuild Call Mats for fuild and for Tube if thats what it is Call Encompass 1-800-638-3328

Oct 05, 2009 | Panasonic PT-47WXC43 47" Rear Projection...

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D52W20BYX1 Green problem


I would go back to green tube disconnect ,unplug CRT board to green tube if set stays up playing its the tube.

Sep 19, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

2 Answers

Screen goes all blue


if it is a KP65ws500 it is one of a group of sets made by Sony where all the picture Tubes(set has a RED, Green, and Blue Tube.) ARE BAD. Most of these sets had all three tubes replaced during a program Sony had. The tubes are NO LONGER AVAILABLE---the only way to get one is remove the tube and send it out for rebuild---most of these cost about 250-300 just for the tube.

The set is shutting down because when the screen goes bright blue it detects one of the CRT's(tubes) is pulling way to much current.

The problem with Replacing your Blue Tube is cost and----sooner or later the other two(red and green) are going to fail also.

best advice is maybe not to fix it.

I replaced dozens of the tubes in these sets when Sony had a recall and provided the tubes for free and paid for the labor etc.

I know I am not giving you good news but I do this here for free and if this has been helpful give me a vote here. Thanks!

Aug 20, 2009 | Sony KP-65WS500 65" Rear Projection...

1 Answer

Only red tube shows picture, but green & blue are on, just no pic


More likely the problem is the blue and green fluid in the tubes is so cloudy that its distorting the image. Get a fluid kit from www.tvrepairkits.com

Jul 29, 2009 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Red Color is not showing up.


THIS TV HAS KNOWN PROBLEMS WITH PICTURE TUBE FAILURES AND I WILL PREDICT THAT AT SOME TIME IN THE FUTURE EVEN IF YOU GET IT REPAIRED NOW, ONE OF THE REMAINING TUBES WILL START GIVING YOU PROBLEMS. YOU HAVE THREE TUBES IN THIS UNIT (RED,GREEN & BLUE) AND THE RED TUBE IS DEFECTIVE. SORRY FOR THE NEWS BUT JUST TRYING TO SAVE YOU THE ULTIMATE COST FOR REPAIRS, FOR A PICTURE TUBE REPLACEMENT AND SUBSEQUENT SET UP IS A MAJOR & COSTLY REPAIR.
HOPE THIS HELPS

Jul 07, 2009 | Sony KP-57WS510 57" Rear Projection HDTV

1 Answer

A lot of red in pic no matter what we do and tint dose not change anything


As is typical with all Philips projection sets the cooling fluid has become contaminated in the blue and green picture tube assemblies. The red is almost never affected with this as whatever bacterial growth is discoloring the fluid in the blue and green tubes can't seem to survive in red light. The blue and green light is shining up through muddly cooling fluid and that is why the red is predominating. A reputable tv repair shop can pull the tube assemblies and dismantle them and clean and reassemble and refill and do all the necessary adjustments for around $300 to $400.

May 26, 2009 | Philips Projection Televisions

1 Answer

The tv is showing red lines on the screen.


These are retrace lines. The screen on the red tube is turned up too high. Inside the set there are 6 knobs. 3 for focus & 3 for screen. Turn down the red screen until lines are gone. These knobs are usually found by pulling of the front panel.

Apr 06, 2009 | Projection Televisions

1 Answer

Tosh 40pw8db


(1) The STK392-110 are the convergence amps, (2) they are not interchangeable with STK392-010 but you could use STK392-150 or 180 for greater reliability. They are merely the same Ic with greater amperage. (3) Yes, there are several low ohm resistors in the return circuit, out front of the convergence amps. Using an analog or digital meter test them for open or change in value and replace as needed.
Bill

Apr 09, 2008 | Projection Televisions

1 Answer

Toshiba 40pw8db with colored lines horizontally


there are some boards in the tv that plug in (push down) have the power off and unplugged have a look around, and see if any boards have come loose, stay away from any thick red wires (EHT) DO NOT PULL At the Gray Rubber Caps that go to each gun (tube) RED GREEN Blue, this can carry a heavey charge even if the tv is off and has been for days, regards mark

Mar 15, 2008 | Toshiba 40H80 40" Rear Projection...

3 Answers

Blue Screen


You have a bad blue picture tube. If you replace it the red and green will be weak and probably go sooner than you think. Everytime I had to replace a tube in a sony projo tv i had to replace all 3 picture tubes at the same time. It's very expensive if you don't have any type of warranty coverage.

C-Dog

Feb 10, 2008 | Sony KP-65WV700 65" Rear Projection HDTV

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