Read LG 37LU25 (CHASSIS:LA85D) Service Manual online
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11. HDMI Audio
Check video output from source device.
Follow procedure HDMI video
trouble shooting guide.
No
Yes
Check EDID NVRAM(IC800, IC801, IC802)
Power & I2C Signal(#5, #6)
Check SIF Signal line.
No
Yes
Follow procedure All source audio trouble
shooting guide.
Replace Mstar IC.
No
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