LG 32LG30 Service Manual page 17

7. HDMI Video
Check input signal format.
Is it supported?
Yes
Check HDMI Cable conductors for
damage.
Yes
Check JK800/ JK801/ JK903
Yes
Check HDMI Signal.
Yes
Check EDID NVRAM(IC800, 801, 902)
Power & I2C Signal (#5, #6)
Yes
Check IC802 Voltage Level 3.3V, 5V &
Output
Yes
Check HDCP key NVRAM(IC102)
power & I2C Signal (#5, #6)
Yes
Check IC802 clock signal
#26, #27
Yes
Replace Mstar (IC100)
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Only for training and service purposes
No
Replace Jack.
No
Check signal line.
No
Replace the defective IC or re-download
EDID data.
No
Replace Power supply regulator or IC802.
No
Replace the defective IC.
No
Replace IC802.
- 17 - LGE Internal Use Only