A band of color for a picture on my 50H72 toshiba projection tv suddenly becomes either half a picture with a thick band of color on top or just becomes a band of color with no seeable picture. We have also had the problem of a too red picture or negative picture which i thought was from the dvd player but apparently was not. What is the solution? jctypes

Is it Toshiba 50H72 and what does tv show in upper half of screen?
These info will help me to diagnose the problem.
Thanks.

Sounds like your convergence circuit went out. It lines up the red,green and blue picture tubes so the colors are lined up. Usually these TVs all use the same type of IC chips called "STKs" both usually get replaced along with any resistors etc.. around these chips that may have burned up. Depending on who fixes it could be around $300-400 parts and labor.

Rustym62

http://www.the-tv-dude.typepad.com

i am pretty sure u need to go to the menu and check your v chip or a button on the tv that starts with the letter v that will control the picture

Projection sets have two very common problems.

The first common problem is convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

i am having the same issue............any solutions??

You have bad conv. ic's.On these sets when the ic's go bad it will usually pop a fuse or burn up a few safety resistors,causing ith video to go away.

Bad caps and solder connections, especially in around the 9v regulator just about center of the defection circuit... Not a terribly expensive job and certainly worth the repair if the cabinet is in good condition...
Bill

Sounds more like the convergance ic's
check these sites out:
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

go into menu turn color off see if you have a black and white picture if not adjust red,green, and blue screen drive on controls in back of tv you have red, green, blue it will have focus /screen controls cover each tube do one at a time blue focus and screen drive adjust to clear blue picture do all 3 tubes, then adjust them to where you have a black&white picture once this is done turn color controll back on.Thank You for using FixYa and Have a Nice Day.

One of your convergence output IC's has burnt out and needs to be replaced. When the IC that handles the Red Vertical (RV) channel goes bad then a small low-value resistor usually burns out with it and the red color will sag inwards at the top and bottom. If you have no experience in repairing and realigning convergence circuits then allow a qualified tech to handle it for you.