LG LHD625 Service Manual page 57

ELECTRICAL TROUBLESHOOTING GUIDE
3A
"LG Logo"
display on monitor
OK?
YES
"LG Logo"
display on monitor
OK?
YES
System part OK.
IC108: 3.3 VA,
NO
IC102: 5 V, IC105 : 3.3 V
OK?
X500
27.000 MHz
OK?
Signal OK?
Replace IC500 MT1389
or IC102, IC105.
3B
Display
NO
cable connection
OK?
2-44
NO
YES
NO
YES
NO
YES
YES
NO
Check IC108 / IC102 / IC105
and SMPS board.
Replace X500.
Replace IC503
(SDRAM).
Proper display
cable connect.