LG HCS6000A Service Manual page 24

(A)
YES
Power is supplied to IC400[HD2]?
YES
Video display clock(IC600(7)) is supplied
to HD2? FIG.01
YES
Change Display Color select switch to
RGB/DVI side and check HV sync.
Any problem ?
YES
END
FIG.01 VDP clock
NO
Check L400( 1.8V), IC950(2) (3.3V).
NO
if there is sinusoidal 27MHz clock. FIG.03
NO
If HV sync exists in IC607 (6,7)
(FIG.04)(FIG.05) then check IC607(1) is
low. If not, check IC201(52).
3-14
Check IC605(5) and IC600(1)
FIG.02.
NG
Check IC605(1,8) and X600