Postive 9v regulator on the signal board and possible capacitor right next to it. the regulator is generic 7809. if you test the output it will be 6 or 7v needs to be 9. when the lines go away it is warm and will read 9v. so do the test cold. i'm assuming you know how to use a multimeter. if not then a local repair shop can do this for you.
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when picture is getting smaller in size or goes away or moves towards one side then hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer
There are some transistors attached to heatsinks (small heatsinks) on the left portion of the chassis. this board that has the input board attached to it is the signal board. those transistors are regulators they are labled 7809 or 7805 depeding if they are 9 or 5 volt regulators. use a multimeter to determine if one pin has 9v (or 5v) coming from it. if not this is your problem. i see alot 9v regulators going bad, some take the cap attached to the 3rd leg with it so check that too. if this sounds overwhelming it might be a job for a repair tech.
we just picked upi a VS-60607 60 inch projectoin tv, There are several issues with this television. when powered on the colors are allconstrued and teh image is often chopped and warped, we hooked upi the cable yet there are only two local channels recieved and the power will turn off randomly every severl minutes. Any thooughts?
Try a "hard restart" , which simply means unplugging the power cord of the TV, then replugging it after 4 hours have passed. This technique helps to reprogram the electronics of the TV.
Hope this suggestion works for you.
If your tv has a picture tube,your problem is in it.
If you have only one line now,the vertical circuit is not working.
You could have jarred something loose around the picture tube.Maybe a yoke lead ???