Toshiba 42HP66 42 in. LCD Television Logo
Andy Payette Posted on Apr 16, 2007

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.

  • 2 more comments 
  • Anonymous Nov 02, 2007

    same problem started after 9 mos.

  • Anonymous Dec 04, 2007

    Mine lasted a little longer, mine started after 15 months, (ya know, just out of warranty). I bought my set June of 2006. starting in OCT 2007, i noticed this problem. Its getting worse and more intense fairly quickly. I dont imagine the screen will make it to the 2 year mark. Burn in appears to occur fairly easily as there are faint ghost images when you turn the screen white.

  • Anonymous Dec 18, 2007

    I just paid the last payment on my Toshiba 42HP66 and I have Red noise flickering on black screen. I also bought my TV in July O6 I was told by a technician that my screen was going out and the red was triggering from the power supply He said "Good Luck" you need a new TV.... I don't know about you but $2000 + dollars and only one year? That's bad business in my book they should recall all the bad plasmas under 2 years old ...Can you say class action?

    Went out today and bought a Phillips1080p LCD with a 3 year warranty! and a 90 day return       Cosco. and free tech help.
    never going to to buy ay sears again

  • diane9951 Jan 06, 2008

    tiny red flickers in small area on lower screen started a few weeks ago now the picture on screen ficks on and off like strobe light. tv 11 months old


1 Answer



Power supply is miss fireing.

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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

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

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

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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

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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!

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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.

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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.

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 / [email protected]


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!

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