LG BH9530TW Service Manual page 70

ELECTRICAL TROUBLESHOOTING GUIDE
4A
"LG Logo"
display on monitor
OK?
YES
"LG Logo"
display on monitor
OK?
YES
System part OK.
IC100: 3.3 VA /
NO
IC150: 1.5 V, 1.2 V /
IC155: 3.3 V OK?
X501
27.000 MHz
OK?
Signal
eMMC_CMD, eMMC_CLK
OK?
Replace IC501 MT8580
or IC150, IC155.
4B
Display
NO
cable connection
OK ?
2-55
NO
YES
NO
YES
NO
YES
YES
NO
Check IC100 / IC150 / IC155
and SMPS board.
Replace X501.
Replace IC506
(eMMC Flash).
Proper display
cable connect.