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Contact any service technician. Its CRT base connector socket, or, LOT is faulty. This is not a user repairable fault. Replacement to any one among component stated above, or both, might need replacement. Gopakumar Gopalan Google
Check its vertical output section circuit for any component damage or loose soldering terminals. Check the solder terminals of the vertical output IC. Resolder all the suspected solder terminals by applying al little more fresh solder, without making any solder bridge short in between adjacent solder terminals. If this do not help you, replace the vertical output IC. Lose of Vertical Scan is the problem of your TV.
hi first of all u should check ur transistor connections.Check your Horizontal and vertical output transistors.You should also check the horizontal and vertical yoke connections as well as your low voltage regulators.... if any of these got damaged u should purchase a new one.. but try to purchase with the help of a tv service assistant...thank u!!! rate me
There are so many thing that can cause this to happen. If you answer some questions we can narrow it down some. 1) when the picture goes black if you hit the menu button on the mitsubishi remote or on the front of the tv itself does the menu show up? 2) After it goes dark how do you get it back? do you turn it off and let it sit for awhile or can you turn it off and then right back on to get a picture? 3) what is the model number? this can be found on the back of the set. If you can answer these questions we can go forward.
Is the picture good or is it dull and dark?
A dull aka weak picture tube will cause low beam current and blank the screen. Last set I had do this I turned up the screen control to make it brighter. Use caution and don't turn it up too high were you see vertical retrace lines in the picture.
You have whats known in the biz as a cold solder connection on the vertical output IC or on the associated components. Not a job for the handi-man unless you know the issues with safty, and precautions to take with Hi voltage inside of tv sets. Shouldnrt cost much for the local shop to find your problem . Now on rare occations the poor connections are inside the IC and the IC has to be replaced. Good Luck