Denon DRA-800H Service Manual page 97

When the results of check item (3-9.3.) are "00"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
Check the RXSENSE/HPD. (Monitor)
Check item(3-9.9.). Checking the HPD and RXSENSE. :
Does the test point of RXSENSE close to the HDMI output terminal
[JK751] indicate the 3.3 V?
Does the voltage of HPD test point close to the HDMI output terminal
[JK751] indicate "Hi" (3-5 V)?
JK751
HDMI OUT
[MONITOR]
HPD
YES NO
Check for a short circuit in the TMDS/HPD line.
If there is no problem, the HDMI Rx/Tx [IC721] is faulty.
Replace with a new device.
HDMI Rx/Tx [IC721] is faulty.
Replace with a new device.
Recheck from check item (3.3.).
If it does not work, replace the PCB.
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