Question about Toshiba 42HP66 42 in. LCD Television

1 Answer

Red Excited Pixels when screen in is black

I just bought a 42" Toshiba Plasma ( 42HP66 ) and when hooking it up to my digital cable box I see pixels turn red in the black color of the screen. This happens if a character is wearing a black suit or in between channel changes. I don't think it is the connection because it does this also when I play a DVD. It is faint but noticable. Is this a connection issue or something internal in the TV. It only happens in black colors. Not in any others.

Posted by on

1 Answer

Re: Red Excited Pixels when screen in is black - Toshiba 42HP66 42 in. LCD Television Flat Panel Televisions

Power supply is miss fireing.

Posted on Jul 27, 2007

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

My 42 in. 42HP66 Toshiba Plasma TV popped and screen went blank

One of your y driver almost go bad. For your future problem please visit my site at

May 07, 2010 | Toshiba 42HP66 42 in. LCD Television

1 Answer

Toshiba 42HP66 No Picture, Only Power Works

try replaced z board Manufacturer Toshiba Part Number 75003032 Description ZSUS PCB ASSY

Oct 02, 2009 | Toshiba 42HP66 42 in. LCD Television

1 Answer

Magnavox 42"

You are correct=====Return it ! It's new, you should not have to have it repaired this soon.

Sep 23, 2009 | SNK Magnavox 42MF231D 42 in. Plasma TV

1 Answer

Samsung plasma red fuzz on black screen

Most likey its a bad panel, you can try adjusting VS voltage on Y main board, if this is to complex you will need a tech

Aug 09, 2009 | Philips 42PF9630A 42 in. Plasma Television

1 Answer

Black line half way down the center of the screen,about 1.5 inche

There's a 'data control' and/or 'address' problem that's developed. Pixels depend on voltage, control, and data coming too their designated address.

A digital circuit feature called a 'DATA_ADDRESS_ BUS" are responsible for 3 criteria: Delivering voltage, control, and data to each pixel in less than a second.

1) If voltage fails the pixels don't light up. They appear black in color (their 'off 'state)....numerous pixels that don't light up look like a black line. But their actually individual pixels with no voltage.

2) If control fails then all pixels are white in color (their 'on' state). Without control the pixels can't adjust properly to high or low 'state', meaning brightness and dimness. This looks like a white line vertically on the screen.

3) If data fails then the pixels can't adjust to the proper color at the proper time.
This appears as a line that changes color out of sync with the entire picture.

Have a technician look at the pixel address registry circuits. As well as control and linear circuits....the problem is somewhere in there!

Jun 13, 2009 | Toshiba 42HP83 42 in. HD-Ready Plasma...

1 Answer

Screen has light red tone in black level

sparkling red pixels. or misfiring pixels.
There is a chance to adjust the screen. has to be done for an authorized service center. Call them and find the closest to your area.

Apr 14, 2009 | Samsung HP-T4254 42 in. Plasma Television

1 Answer

Red pixel cloud in plasma black


Dec 29, 2008 | Samsung PS42P2S 42 in. Plasma Television

1 Answer

Toshiba 42HP66, HDMI problems

Your Cable box might need to be reprogrammed. Call the cable company and they will drive you thru the steps to program it, this way you will get the channels. This process might take you 30-45 minutes.

Jul 12, 2008 | Toshiba 42HP66 42 in. LCD Television

5 Answers

Toshiba 42HP66: red pixles in black screen light on in random order

Hello to all that have Red or Green pixels in the dark areas of any given picture on your plasma screen. I can help your fix your plasma TV. All that needs to be done is an adjustment on the Y sustain board. You will need to remove the stand and the back cover from the TV. Then you'll want to reinstall the stand so that you can set the TV in the up right position. Then hook a dvd player up to the TV and put a movie in and push play. Once you get to where you have a picture on the screen that has a dark image on the screen and you can see the Red or Green pixels push the pause bottom on the DVD player. Know you what to locate your Y sus board. It is the board that is going to be on the Left side of the TV if you are looking at the TV from the back side with the back cover off! If you are not sure what board is the Y sus then please feel free to give me a call! I will guide you to the Y sus board! 1-503-432-9904 Ask for Dave! Once you have found the Y sus you will need to look closely at the board and you will find some Blue/Yellow adjusters on the board! One will say setup and the other will say setdn next to it. Do not touch any of the other adjusters on the Y sus other then the two that I have mentioned above. If you do you could end up damaging your y sus! So once you have located the two adjuster on the Y sus with setup and setdn next to them you will need to take a felt tip pin and make a mark on the top of both the adjusters so the you'll know where the factory setting is just in case you need to start over! start with the setdn! turn it counter clock wise if there is no improvement then turn it clock wise! if there is no improvement then put it back to the factory setting and try the same adjustment to the setup adjuster. You will need to have some one help you while you do this adjustment to the Y sus because the TV needs to be powered on while making the adjustment and thus you will need to pay attention to where you are sticking the screw driver because you do not want to shock the poop out of your self! So find some one that can watch the screen for you while you make the adjustments to the Y sus! If you feel like your unsure about anything regarding this advice I'm posting please feel free to give me a call I will be more then happy to answer any questions you may have. Ask for Dave @ 1-503-432-9904 /


If you are reading this post and you have a similar problem with your Plasma TV or any problem for that matter give me a call I will do my best to help you!


Aug 14, 2007 | Toshiba 42HP66 42 in. LCD Television

Not finding what you are looking for?
Toshiba 42HP66 42 in. LCD Television Logo

830 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Flat Panel Televisions Experts

The Knight
The Knight

Level 3 Expert

66352 Answers


Level 3 Expert

6993 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Toshiba Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides