#Lgtv#Abl_problem.How to repair lg tv with no picture.

LG TV 21"NORMAL PCB MAIN IC TDA12135PS/N3/3/AL6 EHT 6174V-6006M/6006N/N1682 VERTICAL IC TDA4863 SOUND IC TDA7297SA AV IC LA7958N STR W6554A NO PICTURE /ABL PROBLEM 1.Power on/Check ABL voltage at eht pin------ok. 2.Registor R411(1K) output voltage-----ok. 3.Registor R408(5.6K) output voltage-----ok. 4.Check diode D510(IN4148) cathode voltage-----ok. 5.Check diode D510(IN4148) anode voltage------- missing. 6.Power off/Measure diode D510(IN4148)-----ok. 7.Check ohms at anode (D510-IN4148) -------low. 8.Check ohms at main ic pin No.48(ABL)-----low. 9.Open main ic pin 48 from pcb. 10.Again check ohms pin No.48----low ohms-----main ic defective 11.First open eht,because spark it. 12.Open FBT. 13.Set new FBT. 14.Open main ic TDA12135PS/N3/3/AL6 15.Set 64 pin base. 16.Set new ic TDA12135PS/N3/3/MB5. 17.Then------