Observe picture in picture is normal, to judge the problem after putting channel, level measuring Yin around 190 V voltage, power supply is normal, at all levels measured TA8880N feet voltage found RGB. OUT normal, 21 feet (TV/TEXT) is 1.5 V, normal should be 0 V, detect Q607 (C2458) caused by soft breakdown, after replacement, back to normal.T9Nservice manual download site