Read LG 55SL8500-ZA (CHASSIS:LD91K) Service Manual online
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14. HDMI 1~4 All No Video Problem
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace MAIN B’D IC 100
Check the ADJUST MENU
EDID OK ?
YES
Download EDID
(Refer to Adjustment Spec)
NO
NO
Replace
MAIN B’D IC601 (HDCP KEY)
15. HDMI 1 or 2 or 3 or 4 All Video Problem
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace IC100
MAIN B’D IC600
MAIN B’D JACK Check
J600 -> HDMI1
J601 -> HDMI2
J602 -> HDMI3
J601 -> HDMI2
J602 -> HDMI3
YES
* This case is that HDMI Video doesn't display at the some HDMI input, not all.
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace IC100
MAIN B’D JACK Check
J603 -> HDMI4
YES
YES
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