This part is a kind of semiconductor called RZ-37LZ55.
Function of this product has LCD TV SERVICE MANUAL.
Manufacturers : LG
Image and pinout :
Some of the text within the PDF file :
website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : ML-051B MODEL : RZ/RT-37LZ55 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CONTENTS CONTENTS .. 2 PRODUCT SAFETY ..3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION11 TROUBLE SHOOTING 15 BLOCK DIAGRAM. [ ... ]