Removing The Power Supply Retaining Screws - Lenovo ThinkStation 4155 Hardware Installation And Replacement Manual

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Figure 23. Removing the power supply retaining screws

10. Install and tighten the four screws at the rear of the chassis to secure the

11. Install and tighten the two screws that secure the power supply to the inside

12. Reconnect all power supply cables to the drives, adapter cards, and the

13. Go to Chapter 4, "Completing the parts replacement," on page 49.

Hardware Installation and Replacement Guide

6. Remove the six power supply retaining screws at the rear of the chassis and

inside the chassis.

7. Slide the power supply assembly toward the front of the computer and lift it

out from the chassis.

8. Ensure that the new power supply is the correct replacement. Some power

supplies automatically sense the voltage, some power supplies are voltage

specific, and some power supplies have a voltage-selection switch. If there is a

voltage-selection switch, use a ballpoint pen to slide the switch, if necessary.

Note: For models that have a voltage-selection switch:

v If the voltage supply range is 100–127 V AC, set the switch to 115 V.

v If the voltage supply range is 200–240 V AC, set the switch to 230 V.

9. Install the new power supply into the chassis so that the screw holes in the

power supply align with those in the chassis.

Note: Use only the screws provided by Lenovo.

power supply.

of the chassis.

system board. Make sure to reconnect the power cable to the graphics cards

that require an additional cable.

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