Read LG 42LH200H (CHASSIS:LD91Y) Service Manual online
Making
Revision
2009. 2 . 1
LCD TV
Symptom
External Speaker Problem
IC702 operate
normally?
Check the input
source
YES
NO
Re-solder or Replace
the IC702
IC100 operate
normally?
YES
NO
Change input source.
NO
Re-solder or replace
the IC100
Replace it
Replace the external speaker.
Check JK406
Check the external
speaker
NO
NO
YES
YES
22~42LH200H