LG T910B Service Manual page 31

Check white balance adjustment.
G2 voltage is right?
YES
Blank pedestal is on
Pin 19, 20 and 21 of IC302
YES
Is V_FLB and DC_bias on
G1 Pin at CRT socket?
YES
Done.
21. Unsynchronized Image
Compare input sync. of IC401
Pin52 and 53 with output sync.
of IC401 49 and 50.
Are they all right?
YES
Are H_Out and
V_Out of IC401 Pin 20,18
YES
Are H_FLYBACK of IC401
Pin 21 right?
YES
Done.
20. Visible Retrace
NO
NO
NO
NO
NO
NO
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Check G2 control volume and FBT.
Check IC302
and related components.
Check P302 Assy,
Check and replace IC401.
Check and replace IC401.
Check and replace IC401.