Unplug the unit for few minutes, say 15 minutes and then turn it back on. If the problem persists, this would confirm an internal failure. You need to get the TV repaired.
There could be few possibilities ranging from power supply board to y sustain board. You need to open the TV and check the power supply board. If you find any bulged/leaked/swelled cap, you need to replace them.New caps could be available from radioshack or fry's. You need to have electronics repair experience and should know how to use multimeter and soldering iron to repair it yourself.
After this, Would like for you to take your meter and place it on DC voltage, start
at the power supply the positive end on VS, Then VA and the negative
wire to the panel this is the best ground. Turn on and see if the
voltage is present at the VS, VA, V-scan, According to the Label. if a
voltage is missing remove each plug from the power supply to make sure
they are not holding down the voltage, If you don't find one that's
trying to climb, or shows close to what it should be, another method is
to locate a short circuit place meter on ohms or beep test follow same
procedure no voltage should be shorted to ground. And this is the
problem. You can unplug each board one at a time, Starting with the
Y-SUS then the Z-SUS.
Let me know,once done so that we could proceed.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
on Dec 11, 2010