Sharp LC-60LE660U Service Manual page 49

[HDMI1 input]
Is HDMI1 selected on the input select menu screen ?
[HDMI2 input]
Is HDMI2 selected on the input select menu screen ?
[HDMI3 input]
Is HDMI3 selected on the input select menu screen ?
Refer to ":No external input video [HDMI1/2/3]".
YES
[HDMI1 input]
If no video appears, refer to "No external input video (HDMI) [HDMI1]".
[HDMI2 input]
If no video appears, refer to "No external input video (HDMI) [HDMI2]".
[HDMI3 input]
If no video appears, refer to "No external input video (HDMI) [HDMI3]".
Set the audio output to "Fixed".
YES
Is the "Initial Setup" - "Audio select" selected for "HDMI2(Digital)" on the menu screen?
Set the HDMI audio output to "HDMI2(Digital)".
YES
Does the analog audio signal come from pins(11/12)(SP_L/SP_R) of IC3301(CPU) to pins(22/32)(SP_L/SP_R) of IC1701(Audio AMP)?
Check the audio line between IC3301 and IC1701, and their paripheral circuits.
YES
•About the L/R Speakers.
Check the connector (P1701) L/R speakers and their peripheral circuits.
No audio (4)
HDMI1 No audio (HDMI connected)
HDMI2 No audio (HDMI connected)
HDMI3 No audio (HDMI connected)
Is the audio output selected for "Variable" on the menu screen ?
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LC-60/70LE660U,C6600U
NO
NO
NO
NO