No Monitor image <VIDEO>
YES
NO
Is the video signal sent from
pin (41) of IC1301 (AV
switch)?
YES
Check lines and devices
between pin (41) of IC1301
and monitor image output
pin (20) of J1104.
(Q1403)
Check IC1301 and its
peripheral circuits.
No monitor image <S-VIDEO>
YES
NO
Are Y and C signals sent from
pins (39) and (37) of IC1301
(AV switch) respectively?
YES
Check lines and devices
between pins (39), (37) of
IC1301 and monitor S-VIDEO
pins (3), (4) of SC1102.
(Q1401-2)
Check that input signal is
S-VIDEO.
NO
Check IC1301 and its
peripheral circuits
No image (5)