4-2. When the Power Does Not Turn On
Symptom
When turning on the Power button after connecting the power cable, the LED at the front of the -
monitor does not operate.
Major
checkpoints
Check the IC601 power fuse and the adapter. -
Check the connections for the CN600 and the Main board inside the monitor. -
Check the Main board power part and also check whether there is any abnormal output at any -
of the other output terminals.
Diagnostics
IC601
CN600
Yes
Check the connection status for
the function assy.
Yes
Check the circuits related to
IC601.
Replace the Adapter.
No
No
Is DC 5V measured at pins 4, 5 of
the CN600 connector when pins 1, 2, 3
are 0V?
Is DC 3.3V measured at pin 5 of
IC601 when pin 4 is DC 5V?
Yes
Check and replace the Main board.
Caution Make sure to disconnect the power before working on the Main board.
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