LG BPM55 Service Manual page 57

ELECTRICAL TROUBLESHOOTING GUIDE
2A
"LG Logo"
display on monitor
OK?
YES
"LG Logo"
display on monitor
OK?
YES
Power On.
IC501 Vcc
NO
1.2VA, 3.3VA, 3.3V,1.5V
OK?
IC601
Vcc 1.5 V OK?
X501
27.000 MHz
OK?
Signal
NF_ALE, NF_CLE
OK?
Replace IC501 MPEG IC
or IC601.
Display
NO
cable connection
OK?
2B
3-44
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check IC150, IC151,
IC152, IC153 and adapter.
Check IC152 pin4.
Replace X501.
Replace IC602
(NAND flash).
Proper display
cable connect.