Marantz AV7703 Service Manual page 118

When the results of check item (52) are "00"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
Checking the HPD/RXSENSE status register. (Monitor2)
Check item(58). Checking the HPD and RXSENSE. :
Does the test point of RXSENSE close to the HDMI output terminal
(JK432) indicate the (3.3V)?
Does the voltage of HPD test point close to the HDMI output terminal
(JK432) indicate "Hi" (3-5 V)?
JK432
HPD
YES NO
Check for a short circuit in the TMDS/ HPD line.
If there is no problem, the HDMI Tx (IC431) is faulty.
Replace with a new device.
HDMI Tx (IC431) is faulty.
Replace with a new device.
Recheck from check item (5).
If it does not work, replace the PCB.
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