Dell OptiPlex NX1 - Manual (Page 132)

6-16 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual
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To remove the system power supply, follow these steps:
1. Disconnect the AC power cable from the back of the system power supply.
2. Free the system power supply from the securing tab labeled “ RELEASE—> ,”
and rotate it upward until it locks.
Press the securing tab to release the power supply.
3. Disconnect the DC power cables from the system board and the drives.
4. Facing the left side of the computer, move the front end of the system
power supply toward you, and lift it up to disengage the power supply from
the slot in the chassis.
5. Lift the system power supply from the computer.
When you reinstall the system power supply, place the power-supply detent
link over the pin on the power supply as you position the power supply in the
chassis opening.
DC power cables
power-supply
detent link
power supply
securing tab
slot