Denon AVR-3311CI Service Manual page 84

5.3. No picture or sound is output
Are video signals output from U4203 pin 27 (Y) and pin 24 (C)?
Check the analog video circuit.
Are S/PDIF signals output to U3000 pin 21?
Check the Digital audio circuit.
Checking the set (AVR-3311CI):(If no picture is output)
YES
Checking the set (AVR-3311CI):(If no sound is output)
YES
NO
You do not use the USB hub.
NO
U3900 and surrounding circuitry is
defective.
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