IBM MT 2632 manual Removing and replacing a FRU

Removing and replacing a FRU

Removing and replacing a FRU

This section presents information and drawings for use in removing and replacing a FRU. Be sure to observe the following general rules:

1.Do not try to service the computer unless you have been trained and certified. An untrained person runs the risk of damaging parts.

2.Before replacing any FRU, review “FRU replacement notices” on page 47.

3.Begin by removing any FRUs that have to be removed before the failing FRU. Any such FRUs are listed at the top of the page. Remove them in the order in which they are listed.

4.Follow the correct sequence in the steps for removing the FRU, as indicated in the drawings by the numbers in square callouts.

5.When turning a screw to replace a FRU, turn it in the direction indicated by the arrow in the drawing.

6.When removing the FRU, move it in the direction indicated by the arrow in the drawing.

7.To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to replacement. For information about connecting and arranging internal cables, see “Locations” on page 87.

8.When replacing a FRU, use the correct screw as shown in the procedures.

CAUTION:

Before removing any FRU, power off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables.

CAUTION:

Do not disassemble the battery pack, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations.

Attention: Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not loose inside the computer. Verify this by shaking the computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge. Establish personal grounding by touching a ground point with one hand before touching these units.

You must use an electrostatic discharge (ESD) strap (P/N 6405959) to establish personal grounding.

50ThinkPad A21e