Question about Flat Panel Televisions
It is like a vertical and horizontal hold go out. Once I turn the unit off for awhile I can turn it back on and it will work.
I can open the unit and change boards and also have a place to buy parts and get the part numbers.
Is it vertical roll? Or horizontal roll? It could be both.
This is caused by loss of vertical and/or horizontal synchronization of the scanning lines that produce the raster.
It is usually caused by a defect in the electronics section called the deflection circuitry.
You may be able to adjust it back enough to get it working if you can find the vertical or horizontal "hold" controls (they may be called by some other name). They are sometimes seen at the on-screen display section, sometimes on the front or back panel and sometimes inside the back cover. On newer sets it is factory fixed and their are no user adjustments. So, you might have to poke around until you find them.
If you cannot find them, or if you do find them and they don't adjust enough to lock in the picture then you will need servicing and the cost will be to replace the IC or transistor that produces the hold lock on the deflection system.
Hope this leads you the right direction.
If my solution proves useful please accept it.
Posted on Mar 31, 2009
Check the power voltage .may be its an over voltage problem that is going in to the main board so due to that the component getting over heated and due to that this is happening.check out the pcb board voltages.this will clear the doubt.
Posted on Mar 26, 2009
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