Question about Toshiba 27AF42 27" TV

1 Answer

Toshiba 36A42 TV. Dim Picture

After replacing the I/R sensor on main board. I get a dim picture. Adjusting settings to full bright does little to help. All connections appear good.

did I do something when getting board loose? I am not a fully qualified service person and rarely do this thing, but I can replace a bad component (usually)The manual suggests a brightness control on the main board.I can't locate it...

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 45 Answers

Check the "screen" control on the flyback (lower knob) its easy to hit moving a board around. Try to adjust back to its original setting. Look for where the dust is, it should be on top. Or any marks might help. Other wise adjust slowly, back off if any retrace lines appear, with user settings at there normal settings.

Posted on Nov 04, 2007


1 Suggested Answer

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Mitsubishi TV 65 inch rear projection. WS 65809 I went thru the convergence ic chip replacement years ago. Love the TV. My problem now is that the brightness goes from full bright to full dim then...

The old Mitsubishi units had a super capacitor in the logic circuit instead of a backup battery. This capacitor became leaky over time, causing the problem you describe among others. Number one symptom is set has audio and dark or black picture when powered up. As the super cap charges to full voltage, picture comes and goes.

Nov 27, 2014 | Televison & Video

1 Answer

JVC tv sound but no picture

It could be a main board, but it could be a backlight problem. To verify this, turn on the set, dim the lights in the room, shine a bright flashlight on the screen. If you see a faint picture, you have a backlight problem.

Jan 09, 2013 | JVC LT-52X579 52 in. LCD TV

1 Answer

No picture

A very dim picture in this case may be damage to the power supply of the set---If a LCD set it may use back lights of some type--if not on or at full brightness the picture will be very dark.

If I was looking at this set I would open and check to see if voltage for the back lights is correct first.

Jun 11, 2012 | Toshiba 26AV502U 26 in. LCD HDTV

1 Answer

Dim and reddish picture SONY lcd kf-50we610

Light Engine/optical block
Encompass Parts Distrubtion 1-800-638-3328

Apr 14, 2010 | Sony Grand WEGA KF50WE610 50" Rear...

1 Answer

Replaced wd-62525 lamp, picture dim

Cleaning the mirrors will not increase the brightness much. I would double check the lamp setting in the Menu and also the setting of the picture and brightness settings. Many times these are adjustable independently for different inputs. Besides this, I would look at the Ballast and or the Power Supply to cause the problem. I would recommend a professional to look at it if it is not correctable from the Main Menu of the set.
Hope this helps,

Jul 17, 2009 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

Picture (video) jumps from bright to dim

I figured it out myself. R243 was intermittently open. Replaced it, and now we can watch the Super Bowl.

Dec 19, 2008 | Toshiba 50H72 50" Rear Projection...

1 Answer

Picture washed out, can't get it right

LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:

Symptom: No picture on screen but LCD TV still has sound.
Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound.
Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture
Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound
Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits
Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright
Solutions: The problem is cause by defective LCD Panel.It needs to be replace.

Sep 21, 2008 | Akai LCT2715 27 in. LCD Television

2 Answers

Dim picture

If decide to do yourself, ya only have to do the green and blue ones, the red light spectrum won't allow fungal growth. Pull whole CRT assembly out to prevent spilled/leaking glycol from onto lower main boards

Sep 04, 2007 | Philips Magnavox 51MP392H Rear Projection...

Not finding what you are looking for?
Toshiba 27AF42 27" TV Logo

Related Topics:

80 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74999 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jaime Hernandez

Level 3 Expert

2326 Answers

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

Answer questions

Manuals & User Guides