Question about Toshiba 42H83 42" Rear Projection HDTV-Ready Television

3 Answers

DARK PICTURE PICTURE VERY DARK . HAVE CHECKED HIGH VOLTAGE CHECKS OK 31KV

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  • xrserv Aug 03, 2008

    have restarted many times not an answer.
    need more help

  • xrserv Aug 03, 2008

    thanks for nothing

  • xrserv Aug 09, 2008

    latest solution turns out to be for a plasma tv the 42H83 is CRTs driven .

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3 Answers

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Is it dark as well when you watch dvds? Have you tried adjusting the brightness on the TV Menu/Settings?

Posted on Aug 03, 2008

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It could be this one:

Symptom:

Green flashing in the picture and/or dark picture. (Note: Multiple symptoms
could be exhibited with this problem)

Corrective Action:

for troubleshooting guid please click on this link to get the Toshiba TV Technical Bulletin

(Go to Page 3)

there are figure, pictures and steps that will need to be followed to get the TV back in great shape

Hope this helps, good luck

Posted on Aug 03, 2008

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  • 310 Answers

Just restart the tv and can u tell me company name and model no.........

Posted on Aug 03, 2008

  • khader ibrahim Aug 03, 2008

    Model no pls...........



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1 Answer

I checked the capcitor in my Maytag Microwave and its good but the microwave won't heat. Everything works lights, blower and turntable.


If you're getting high voltage at the cap & the rectifier checks OK, you're looking at a new magnetron - Probably not worth replacing.

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Toshiba 50A61 have sound but no picture - all fuses check okay


Not too many--if sound is developed from the set and not a surround system the set will blank the 3 picture tubes for a few reasons:

Voltages missing at the tubes (high voltage or screen voltages etc)

There is a loss of vertical sweep or horizontal sweep--set will do here this to prevent an INSTANT burn mark on all 3 tubes.

One thing you can try to look for is to see if the filament in each tube is lit---rather dim as 6.3 volt one---if lit the above reasons are your problem.

Without a meter, a schematic etc not much more you can check.

You should hear a faint whoosh sound when you power the set on--the high voltage coming up.

Jun 07, 2012 | Toshiba 50A61 50" Rear Projection...

2 Answers

Picture is dark, so you have to turn up the black level, contrast, etc. is that the picture tube or have you heard of this problem before, maybe something inexpensive and easy to fix


the picture tube is already weak. if you could only have a reduvinator it will be good again, it is a instrument used to reduvinate the picture tube.

Jul 01, 2011 | RCA F32718 32" TV

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My Sony KDL-32M3000 has dark reddish picture, checked the ribbons around the frame they're ok, power supply is ok, Hi voltage board is ok, I'm guessing the main video processing board since I don't have a...


It will be either BM board (Video Processor board) or Tcon Board (top side of panel). I have similar problem...my TV turns on, lamps turns on (you can see them from back side panel holes) but just a dark blue picture appears with no image (like picture when external input is selected without signal), no OSD appears....some times I can heard audio (using Antena).
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Dec 25, 2010 | Sony KDL-32M3000 32 in. LCD Television

2 Answers

No light or picture. only sound and the screen is dark.


Two probable points; either the loss of the service voltage for the high voltage section or a failure in that section.
The circuit that produces the high voltage for electron beam acceleration also produces the sweep for the horizontal movement of the beam, in other words, if this circuit fails or the voltage it needs to operate is gone, no picture, but the audio still functions.
Because of its Chinese origins, there is a chance that critical specialized parts may still be available for it or, if you are lucky to have a tech competent to repair standard TVs, he may find a less critical part that has failed and readily available.

Dec 01, 2010 | Haier TN201AUV 20" TV

1 Answer

Pink hue to picture


Pink hue picture denotes the absence of green colour. Check the green video output transistor for open. It can be easly recogansized by taking the voltage at the collector point of that transistor. It will be high, almost equal to its supply voltage. Measure the base voltage of that transistor also. If there is no base voltage the symtom occurs. if it is so trace the track and reach to the green output pin of the related ic. If there is also no voltage, Ic may be fault. on the otherhand check the green cathode of the CRT is ok. It is quite easy. Detach all the components related to that pin, or make a temporary cut to isolate the green cathode. The switch on the set. If a green colour [High intensity] perists, the CRT is ok. You can check it in an other way. Take a 2W resistor fo value 470k or more, connect its one end to earth point, and other to the green cathode pin [Just Touch and Out], a green screen will flash on the screen. If these to checks fails, CRT is faulty.

Oct 14, 2010 | Toshiba 36HF71 36" TV

1 Answer

The picture is dark


Hi This could be one of three possibilities, one the High Voltage Screen Adjustment is off, Two the Picture Tube is Weak, or Three there is a problem with the Video Drive Amp/Amps, these are things that should be checked or adjusted by a qualified technician, especially the High Voltage Screen Adjustment, hope this helps.

Apr 15, 2007 | Zenith H36F46DT 36" TV

1 Answer

Very Dark Picture


This sounds like a typical problem in the sweep power supply.. theres a filter capacitor for the CRT screen voltages that is most likly open or changed value. the first clue is that you get all your colors on the convergence. this is a high voltage circuit and should not be messed with by the user unless they have solid state repair exoperience and know all the high voltage saftey factors involved. Please call in a trained tech to assist you in this matter. Good Luck

Oct 08, 2006 | Toshiba 42H83 42" Rear Projection...

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