When The Power Does Not Turn On - Samsung 943NW Service Manual

4. Troubleshooting

4-2. When the Power Does Not Turn On

Symptom
Major checkpoints
Diagnostics
Caution
4-2
Great user manuals database on
- When turning on the Power button after connecting the power cable, the LED at the front of the
monitor does not operate.
- When turning on the Power button after connecting the power cable, the LED at the front of the
monitor does not operate.
- Check the IP board power fuse and the IP board output power.
- Check the connections for the IP board 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.
CN 600
IC 601
IC 602
Is DC 5V measured at pins 5, 6 of the
CN600 connector when pins 3, 4 are
0V?
Yes
IIs DC 3.3V measured at pin 3 of IC601
when pin 1 is DC 5V?
Yes
Is DC 1.8V measured at pin 2 of IC602
when pin 3 is DC 5V?
Yes
Check and replace the IP board.
Make sure to disconnect the power before working on the IP board.
UserManuals.info
Yes
Check the connection status for
the function assy.
No
Replace the IP board.
Check the circuits related to
No
No Check the circuits related to
IC601.
IC602.