Power measured power output up to B1 156V, power regulator with Richard optocoupler IC802 (P621) 1,2 feet already open, Q840 (2SA1015) the BE junction resistance becomes larger nearly doubled, to replace the power output of B1 normal 115V, then boot still no light, check scanning circuit block IC501 (TA8659) 40-pin end of the line supply voltage of only 3.5V, while the normal voltage should be 9V, disengage the 40-pin, measuring the voltage returns to normal the 9V, description TA8659 has been bad, replacement, troubleshooting.xSVservice manual download site