Question about Toshiba TW40F80 40" Rear Projection Television
Some days ago my tv had been in high humidity risk. after that when I turn power the blue screen appears,however no channel are displayed.The channel are changed but no signal coms.
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Posted on Jan 02, 2017
SOURCE: blue crt assmbly maybe?
its very possible that the blue CRT is horting the set out. Heres how you can test it. Remove the speaker grille and access panel behind the grille and you will see the crts. remove the blue crt circuit board from the end of the blue crt and make sure it isnt touching anything then try powering up the set if it doesnt shut down then you have found the problem and you will need a new crt. or you can switch the blue circuit with the green and try it iwth the blue on green and the green on the blue then if the screen turns green before shutting down you will know that its a problem in the blue drive circuit and not the crt. lety me know if you need further assistance.
Posted on Apr 01, 2008
It sounds like you have a tuner problem. Usally the set will turn blue if there is no signal to the set, which is first generated from the tuner. It could also be the processor on the main board, but I would look at the tuner first.
Good luck and I hope this has helped
Posted on May 28, 2008
If you are capable of some basic troubleshooting you can determine what's wrong but you won't likely be able to fix it yourself. If you remove the TV's back panel, you can locate three plug connectors for the convergence correction yokes. You pull the red, blue, and green connectors and then plug the TV back in and hit the power button. If the TV comes on, its a failure of the convergence output ICs and will cost $350-450 if you call in a service company.
Posted on Feb 15, 2009
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