[Scott R]

Originally posted by JanusCole
Okay, I recently got an older projection TV. It has three CRT guns and has a 46" screen. At first, I got it on a lark. But now I am really starting to dig the big screen. It looks frickin' awesome (especially for F1 races). However, it has started to exhibit some odd behavior. Every now and then, the picture will distort severely. It looks as though the tuner is set "between" stations or maybe the vert or horizontal hold is out of whack. And I am sure it isn't caused by the mirror or anything like that because I can pull up the tv's internal menus and they appear perfect.

Now, the weird part is that I can often temporarily "fix" the problem by switching channels or turning the power off/on or switching from antenna to aux input or a host of other seemingly unrelated "changes". And yet, none of these "changes" works every time. Sometimes flipping the channel will "fix" it. Sometimes switching the input source a few times will "fix" it. It seems to follow no pattern.

So does anyone know enough about tv's to offer a guess as to what is happening? Or if it is unrepairable, is there a way I can just gut the internal electronics and run the CRT's off of another tv or another "motherboard"?

If it's a Mitsubishi then I would check the convergence circuit, they overheat and break the solder traces. The good thing is it's an easy fix to remove the tuner board and redo the solder joints.