Samsung P2370HD - Full 1080p HDTV LCD Monitor, Service Manual

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4-2
4. Troubleshooting
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
CN1001
IC1023
IC4010
Yes
No
Does proper 14.5V appear at pin
No. 2 of CN1001?
①
Does proper 5V appear at pin No.
6 and 7 of CN1001?
②
Check IP Board
Yes
No
Does proper 3.3V appear at pin
No.1 of IC1024?
②
Check related circuit of IC1024.
No
Does proper 14.5V appear at
BD1013?
①
Does proper 5V appear at
BD1021?
②
Check related circuit of CN1001.
Yes
Yes
No
Does proper 14.5V appear at
IC1023?
③
Check related circuit of IC1022.
Change main board for
Scaler(IC4010) problem
Caution Make sure to disconnect the power before working on the IP board.