LG LHB976 Service Manual page 123

MAIN SET TROUBLESHOOTING
1-6. NO HDMI OUTPUT
No HMDI audio / video output
YES
JK803
pin18 Vcc 5 V
OK?
YES
JK803
pin19 HP_DET about 3.3 V
OK?
YES
Is there signal on
R841, R842?
YES
Is there signal on
X802?
YES
HDMI output OK.
NO
Check L803 and Vcc 5 V line.
NO
Check hot plug detect signal from TV.
NO
Check IC801 Vcc or replace IC801.
NO
Check X802 or replace X802.
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