No Hdmi Output - LG LAB550H Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. NO HDMI OUTPUT

No HDMI audio / video output
CN803
5 V OK?
IC101
HDMI_SCL/SDA, EDID_SW, CEC_RX/TX,
HDMI_RST OK?
CN803 pin19 HP_DET
about 3.3 V OK?
Is there signal on CN803
pin1, 3, 4, 6, 7, 9, 10, 12?
HDMI output OK.
YES
YES
YES
YES
YES
NO
Check 5 VA IC151.
NO
NO
Check hot plug detect signal from TV.
NO Check IC501 MT8553 VCC
or replace IC501 MT8553.
2-48
Check IC101.