No Video - Hdmi - LG 28LB45 series Service Manual

4. No Video - HDMI

Check input signal format
Is it supported?
Yes
Check HDMI Cable for Damage or
Open Connector.
Yes
Check JK801 for proper connection
or Damage.
Yes
Check I2C Signal
(JK801)
Yes
Replace Main Scaler. (IC101)
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Only for training and service purposes
No
Replace Connector.
No
Re Download EDID Data.
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LGE Internal Use Only