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

3 Answers

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

Posted by on

  • 1 more comment 
  • 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 .

×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,268 Answers

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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,689 Answers

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

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 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...........



×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Picture flickers every few minutes


There are several possibilities. This model is based on CRT (picture tube) technology, and has a high voltage circuit. This circuit consists of three heavy wires, one from the side of each picture tube (red, green and blue) going to a single connection block. There is another heavy wire from this to the high voltage transformer on one of the circuit boards.

First, unplug the set, and wait 20 minutes to make sure everything is cool and residual high voltage charge has drained away. Check the wires at the connection block to make sure they are not loose. There is usually some sort of retainer clip to lock the wires in place, make sure these are not broken or unlatched (sometimes they get brittle with heat and aging). Frequently these are covered with a thick layer of dust held on by electrostatic attraction; gently vacuum this off. If all looks good, plug in the set, and wait until it's dark outside. Turn on the set with the room lights off, and look at the high voltage parts. If you see a blue corona glow or sparking, that part has an insulation breakdown problem or a bad connection. It is normal to see an orange glow at the bottom of each picture tube, and you would also see the three colors of the picture coming out of the tops of the picture tube. WARNING: do not touch the interior of the set while it is on, especially not in the dark.

Another probable cause is a cracked solder connection on the power/deflection board (the one with the high voltage transformer on it). If the flickering is one color rather than white or a momentary darkening, the problem is in one picture tube circuit (yellow -> blue dropout; ->cyan -> red dropout; magenta -> green dropout). The picture tube circuit includes not only the high voltage (second anode) section, but also the picture tube drive connection on the base of the tube all the way back to the video processor and switching circuits.

Apr 04, 2015 | RCA D52W20 52" Rear Projection HDTV-Ready...

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.

Aug 23, 2014 | Microwave Ovens

1 Answer

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

1 Answer

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).
I'm thinking getting the BM board.

Dec 25, 2010 | Sony KDL-32M3000 32 in. LCD Television

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

My tv has sound but no picture


hello Your set, with a dark screen or no picture but with sound is failing in the high voltage to the picture tube. It is caused by a failure in the horizontal deflection circuits which generate the high voltage (20,000 volts). The repair is expensive; at least $100 or more, most likely, depending on exactly what components have failed.
Regards Gizokieth

Sep 11, 2009 | LG 42LC2D 42 in. LCD HDTV

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...

Not finding what you are looking for?
Toshiba 42H83 42" Rear Projection HDTV-Ready Television Logo

642 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

71635 Answers

Jaime Hernandez

Level 3 Expert

2294 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

Are you a Toshiba Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...