Red spot in the middle of the screen

My toshiba 42h83 has a red irregular shaped area in the middle of the screen. at first i thought the kids used markers on the screen but after removing the screen and cleaning it and the lenses the problem still remains. there is also faint green green lines in the background

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• mike jackson Jul 01, 2007

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You most likely have a burn in on the surface of one of the picture tubes. What you need to do to confirm this, would be to take off the front screen, and with the set turned on, look directly into each one of the lenses, and see if you see a mark on the green or the blue tube. if this is the case, and I am pretty sure it is, the picture tube will need to be replaced, but this set is not a young thing, as the green faint lines is most likely a bad capacitor in the screen drive circuit. If the picture tube is indeed burned on the surface, most likely be better off buying a new TV set. Good Luck

Posted on Jun 25, 2007

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Posted on Jan 02, 2017

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Not sure if this will help...

Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

• Screen Looks 3D
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• Screen may look distorted
• No Audio/Video - TV makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms

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You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
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Nov 21, 2007 | Toshiba 42H83 42" Rear Projection...

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Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

Aug 04, 2007 | Toshiba 42H83 42" Rear Projection...

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Most projects in life are "easy",if you know how.Chassis will have to be pulled,convergence IC's replaced w/top quality parts to prevent recall.Some excellant soldering will be needed for prevent maintenance,for instance,the steel jumper wires feedig b+ to convergence IC's. RE-align in servicer mode==final step.

Aug 03, 2007 | Toshiba 42H83 42" Rear Projection...

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