4-2. No Power
Symptom
The LED on the front panel of the monitor does not work when the power is connected and the -
Power button is pressed.
Major
checkpoints
Check if the Power switch on the rear panel of the monitor has been turned on. -
Check the SMPS fuse and the IP-Board output power. -
Check the connection between the IP-Board and the Main Board inside the monitor. -
Check the power part of the Main Board and check if a similar symptom appears at another -
output terminal.
Diagnostics
Main Board Front
CN210
IC5001
Yes
No
Does proper 14.5V appear at pin
No. 2 of CN210? ①
Does proper 5V appear at pin No.
6 and 7 of CN210? ②
Check IP Board
Yes
No
Does proper 5V appear at pin
BD1021? ②
Check related circuit of IC1021.
No
Does proper 14.5V appear at
BD204? ①
Does proper 5V appear at
BD202 or BD203? ②
Check related circuit of CN210.
Yes
Yes
No
Does proper 14.5V appear at
BD1020? ①
Check related circuit of IC1030.
Change main board for
Scaler(IC5001) problem
Caution Make sure to disconnect the power before working on the IP board.
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