When The Power Does Not Turn On - Samsung T220 Service Manual

4. Troubleshooting

4-2. When the Power Does Not Turn On

- When turning on the Power button after connecting the power cable, the LED at the front of the
Symptom
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.
Major checkpoints
- 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
Is DC 5V measured at pins 5, 6 of the
CN600 connector when pins 3, 4 are
IIs DC 3.3V measured at pin 3 of IC601
Diagnostics
Is DC 1.8V measured at pin 2 of IC602
Caution Make sure to disconnect the power before working on the IP board.
4-2
IC 602
IC 601
0V?
Yes
when pin 1 is DC 5V?
Yes
when pin 3 is DC 5V?
Yes
Check and replace the IP board.
Yes
Check the connection status for
No
Replace the IP board.
Check the circuits related to
No
No Check the circuits related to
the function assy.
IC601.
IC602.