Hitachi 55HDT52/DW1-U Service Manual page 74

11.2.1 Trouble shooting for HDMI
(1) No HDMI picture
Start
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
NG
OK
NG
OK
NG
OK
Digital Module, SIgnal PWB or
Signal Power PWB defect
Digital Module (HDMI) defect
I101 or I102 defect
73
DW1U