Troubleshooting
4-2
Samsung Electronics
4-1-2 Checkpoints by Error Mode
■ No Power
Symptom
- The LEDs on the front panel do not work when connecting the power cord.
- The SMPS relay does not work when connecting the power cord.
- The unit appears to be dead.
Major
Checklist
The SMPS relay or the LEDs on the front panel does not work when connecting the power cord if the cables
are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
- Check the internal cable connection.
- Check the fuses.
- Check the output voltages of the SMPS.
- Replace the Main Board.
Troubleshooting
Procedures
1
2
4
5
3
Check that the AC power cord is connected
Connect the AC power cord
①
If LED is set up as being ON when
POWER-ON, check the ligt-on in LED
Is the AC Inlet socket connected?
Check the connection between Fuse FE801
,FB801,FS803 for checking SMPS’s Fuse
Replace Fuse (FE801)
Connect AC Inlet socket
Yes
No
No
No
Yes
Yes
Check the No. 4 STAND-BY power of
CN801
Yes
Replace the Main Board
Yes
②
③
④
⑤
Replace Fuse
No
Replace the SMPS
No
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