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ELECTRICAL TROUBLESHOOTING GUIDE
2A
System part OK
Check IC150, IC151,
IC152, IC153 and adapter.
Proper display
cable connect.
Replace X501.
“LG Logo”
display on monitor
OK?
“LG Logo”
display on monitor
OK?
IC501,
Vcc 1.2V,3.3V,1,1V,
1.5V OK?
Display
cable connection
OK?
X501
27.000 MHz
OK?
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Check IC152 pin4.
Replace IC603
(NAND flash).
Replace IC501 MT8551P
or IC601, IC602.
IC601,
IC602 Vcc
1.5V OK?
Signal
NF_ALE, NF_CLE
OK?
NO
NO
YES
YES
2. SYSTEM PART
Power on
2A
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