No Power On; Micom Part Check - LG PT-43 Service Manual

6. NO POWER ON

6.1 MICOM PART CHECK

Check input voltage of
IC001#9,11,13,30,37,42,44
YES
Check IC001 #34,35
(OSC)
YEs
Check IC001 #3, 4 (SCL,SDA)
YES
Check IC001 #46 (ABN)
HIGH
Check IC001 #24 ( IR ),
#47~52 (Key In)
NO
Check SMPS Board
NO
NO
Replace Q003, Q004
LOW
Check Abnormnal Circuit
NO
Check P004AP connector
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Replace X001