Samsung ML-3471ND/XAX - Page 125

Adjustment and Troubleshooting
Service Manual
4-57
Samsung Electronics
9) No Power
1. Check if the power input
and SMPS output are normal.
Replace the power supply cord
or SMPS.
1. Replace the control board.
2. Replace the OP panel.
2. Check the inferiority
of LED-Panel or LDC window on the
front-cover if the OP panel does not
appear after normal
warming-up.
Description: When system power is turned on, all lamps on the operator panel do not come on.