Dell 1135N Service Manual page 133

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