Due to AV mode to play correctly, the down position before the AV/TV converter ICl401. In accordance with the maintenance method in the previous example (see Figure 5), and Q1403 c measured voltage is 6. 2V,R1413 12V normal at the top, remove R1413 measure some value has increased to 290 ω. Go check the circuit board on the other two insurance R1430, R1419, to a different degree of resistance of the resistance increase, above all three insurance resistance after replacement, troubleshooting.