+ 140 V of this machine is normal, suspected fault protection circuit, measuring IC601 55 feet 0.7 V (0 V) normally, judge IC601 protection circuit starts. Using individually disconnected IC601 55 feet protection detection circuit connected components, one by one to remove protection method to judge fault range. When broken after scanning protection tube Q451 R465 collector resistance, line scan circuit to work properly, but the screen appear bright line, which determine field output circuit malfunction. Resistance method with "' Zha IC451 readings of the output circuit, serious internal short circuit. After replacing IC451 boot still protection, voltage measurement IC451 each foot, no field power supply voltage, to test the field output circuit power supply circuit, found that resistance R450 Ω (1.5). After replacement, the TV back to normal.tE8service manual download site