The fault phenomena in the case of not pick up the signal, can rule out the problem of D board, DG board. Because it is irregular black belt, SU, SD, C1 and C2 board, the screen is not likely to damage, so, only the SC, SS, P plate. P plate damage mostly don't boot, SS plate damage possibility is not big, also check the SC plate. cxQservice manual download site
 cxQservice manual download site
Boot, the first measure the SC board Vsus, Vset, Vscn, Vad, the voltage at various points found Vset measured voltage on the low side, about 180 v, normal value is 230 v. In order to distinguish the fault in the booster circuit or level in the circuit, disconnect R6498, boot instantaneous measurement voltage Vset, restore to the normal 230 v, shows faults in the circuit level, the road examination revealed Q6524 short circuit, after replacing Q6524, troubleshooting.cxQservice manual download site