Troubleshooting Guide - LG FLATRON W2453V Service Manual

(POWER INDICATOR OFF)
CHECK P301 VOLTAGE
1
PIN5, PIN6 (5V)?
2
IC301 PIN2
1 3
CHECK IC101 PIN25
1 4
CHECK IC101
Waveforms
P301-#5,6
1
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Only for training and service purposes

TROUBLESHOOTING GUIDE

NO POWER
YES
YES
PULSE
YES
IC303- #2
2
1. NO POWER
NO
NO
NO
IC303
3
- 15 -
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC303 PIN1(3.3V)
IC303 PIN4(1.8V)
CHECK CRYSTAL(X101)
IC101
4
LGE Internal Use Only