Sharp LC-40D68UT Service Manual page 59

INPUT-5 No audio (HDMI connected)
INPUT-6 No audio (HDMI connected)
INPUT-7 No audio (HDMI connected)
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
[INPUT-6 input]
Is INPUT-6 selected on the input select menu screen?
[INPUT-7 input]
Is INPUT-7 selected on the input select menu screen?
YES
[INPUT-5 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-5]".
[INPUT-6 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-6]".
[INPUT-7 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-7]".
YES
Is the audio output selected for "VARIABLE" on the menu screen?
YES
Does the audio signal come from pins (C4/A3) (SPOUT_L/R) of IC8001 (CPU) to pins (3) (INLP), and (7)
(INRP) of IC2701 (AMP)?
YES
Is the audio output from IC2701 as specified?
YES
Check the connector (P2701), speakers and their peripheral circuits.
No audio (3)
NO
Refer to ":No external input video [INPUT-5/6/7]".
NO
Set the audio output to "FIXED".
NO
Check the line between IC8001 and IC2701, and their peripheral circuits (Q1306/
Q1307, AMP_MUTE line, etc.).
NO
Check IC2701 and its peripheral circuits.
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LC-40D68UT