Read LG 50LN5400-SA / 50LN5400-SB (CHASSIS:LJ36B) Service Manual online
Appendix : Exchange PSU(LED driver)
No Light
Dim Light
Dim Light
Dim Light
No picture/Sound Ok
Click on the first or last page to see other 50LN5400-SA / 50LN5400-SB (CHASSIS:LJ36B) service manuals if exist.