Hitachi 42HDX62/DW1-U Service Manual page 73

TROUBLESHOOTING FLOWCHARTS
11.2 TROUBLE SHOOTING for HDMI
(1) No HDMI picture
Ensure power at pin 1 of IK03.
Ensure power at pin 4
of IK03, IK06, IK07 and IK08.
Ensure Y, H, V and Clock
signal at pin 1 of RK55.
IK02 defect
Start
OK
OK
OK
Digital Module, SIgnal PWB or
Signal Power PWB defect
NG
Digital Module (HDMI) defect
NG
I101 or I102 defect
NG
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DW1U