3 things will cause this and one wil be the problem. first off flashing green indicates protection mode.
Check for a faulty vertical chip. usualy removing it and briefly turning on the set will make the set work with a line across the middle of the screen. If the chip is the fault please replace the capacitors around the i.c as the fault will reaccur.
next check the horizontal out transistor , it should not be shorted between base and collector. if so check for dry joints around flyback trany and horizontal stage circuit.
last is the 8 volt regulator that supplies the micro its power. located on the power module.
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