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Re: TV works fine for about 1hour.....then the picture
You have a problem in the Hi voltage or horizontal drive circuit most likly. Its a slight possiblity that the video is going out because of a cold solder connection from the flyback transformer blanking pulse to the video/sync separator circuit as it does and has happened in the past. This set should only be serviced by a trained service person as there are no real user serviceable parts inside this set. Good Luck
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a picture that blinks in & out every few seconds then it could be a bad tube. I know the older models the picture would flash in and out with snow etc. that was a tuner problem. haven't worked on very many sony wega's, maybe another tech here has a better ans.
I have the same problem with a 40" Toshiba LCD, Component cables work fine with FIOS but not HMDI, goes in and out then blank. HDMI with DVD player works fine. Best buy reported this same problem from users with this toshiba lcd but no solution.
this is a very common problem just unplug tv for 5 minutes it
should fix it . simple fix most of the time with rca and proscan.
If that does not do it go into menu scroll down to audio and then press on .
Many problems with this unit with the HV transformer (flyback) and also a regulator ic in the power supply. Sorry, nothing easy for this type of problem. You will need a tech to diag. and repair this problem.
You'll have to locate the vertical output IC which should be mounted onto a heatsink, then take out a good magnifier under the printed circuit board and examine the solder connections on the pins of that IC and resolder the ones that are cracked.