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Your blue picture tube is failing. Invest in a new TV. "If" you can find a new set of tubes(you have to replace all 3 red blue and green) they are around $800-1000. Not cost effective. Run the TV into the ground if you want to wait but do not invest any repair money in my opinion.
check your input cables to be sure they are good & installed all the way, it that doesn't fix it you may need circuit board
DM PWB part# 934C225002
see this site for availability & price: http://www.shopjimmy.com/catalogsearch/result/?q=934c225002
Your TV has three picture tubes which are aligned to properly converge the projected light beams on the screen. Each picture tube projects a single color of Blue Green or Red. During production your TV was carefully adjusted to properly align these colors. As a feature you have the ability to adjust these colors.thats called convergence.If you don't have a manual to show you how to adjust you can find one here http://www.mitsubishi-tv.com/support.html
Hi, did you try a color convergence? I used to work in Best Buy and one of the key things about rear projection TVs and the reason they push those service plans on you is that the tubes/colors need to be calibrated each year. You can do this yourself by checking out the following website:
http://lgknowledgebase.com/kb/index.php?View=entry&EntryID=3229 Hope this helps :)
You can probably purchase a smilar set on Craig's list for $300.00, at least that's what they go for in the Austin Texas area.
A new tube may be too expensive and difficult to replace.
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