Re: Lg 42pb4dt

Well I see this answer is very late, but here it is.

The problem with the TV is the power supply going into OCP(over current protection). The Transistors Q852 and Q851 are suffering from a C,B,E short. Basically the die has broken down and caused the Transistors to fail.
However this is not the entire problem. This issue was cause when IC U851 PN#L6598 High side driver became stuck on cooking the transistors.

Change the above parts and also change the 2 bypass diodes D851 and D852 PN# SB140. They are must likely compromised....