LG StudioWorks E700B - TROUBLESHOOTING GUIDE; No Power and No Character Troubleshooting

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TROUBLESHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
TROUBLE IN D900
TROUBLE IN FUSE
(F901)
TROUBLE IN
IC901
TROUBLE IN
D941, D942, D951,
D961, D962, D971
TROUBLE IN
Q903, Q952,
Q951, Q942, Q941
CHECK
FUSE OK?
(F901)
CHECK
C908 VOLTAGE?
(AC120V: 160VDC,
AC220V: 304VDC)
NO
YES
YES
YES
YES
NO
NO
NO
CHECK
IC901 PIN 6
WAVEFORM
(SQUARE WAVE
COMES OUT?)
CHECK
D941, D942, D951,
D961, D962, D971
VOLTAGE?
1. NO POWER