The CRT is misaligned, but in a weird way. In the lower center of the screen, the blue CRT arches out really strong to the right, but only to the right and only in this localized area. I'm thinking about just getting a new TV if it's too much trouble.
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this is likely caused by a misaligned deflection coil on the blue CRT or in the blue deflection amplifier circuit or a defective deflection coil assembly, you may be viewing a inductor ring, posibly due to arking internal to the coil these are the most likely faults
I have a Toshiba 46h84 with similar problem that needs a new green crt. Mine does not have a cooling fan. I don't know if having a cooling fan would help the problem, but mine didn't come with one. There are rear projection TV's that have bulbs in them that require a fan. This particular model uses a red, a green, and a blue crt to generate the picture and probably doesn't need one.
the tube will be around 400.00 and then the repair tech will want maybe 150 to install. Try this link they may be able to get you one some what cheaper and give free tech support so you could install it yourself. http://servicemanuals.vstore.ca/
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.