LG 23LC1RB-TB Service Manual page 15

No Raster
Check LED Status
on display unit
Check
L300, L301, L302
Pass
Check the input/
Output of IC300
Pass
Check inverter
Connector or inverter
Pass
Check panel link
Cable or module
Pass
Check input source cable and jack
:[B]Process
Fail
Fail
Fail
Fail
Fail
Fail
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Repeat A PROCESS
Change
L300, L301, L302
Change IC300
Change inverter
connector or inverter
Change panel link
cable or module
Change module