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FLATRON L1930B
Service manual
Troubleshooting Guide - LG FLATRON L1930B Service Manual
Color monitor
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Troubleshooting
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TROUBLESHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
CHECK J603 VOLTAGE
PIN5, PIN6 (5V)?
YES
CHECK
U202 PIN 32 Voltage
(5V) ?
YES
CHECK KEY CONTROL
CONNECTOR ROUTINE
YES
IS U201
PIN11(3.3V)
VOLTAGE REPEATED AS
PULSE SHAPE?
YES
CHECK DATA LINE
CONNECTION(U201, U202)
1. NO POWER
NO
NO
NO
- 17 -
CHECK POWER BOARD, AND
FIND OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK 5VS LINE
(OPEN CHECK)
NO PROBLEM
CHECK U201 VCC
XTAL, RESET
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