FRU replacement notices
vThey are harder to tighten.
vThey should be used only once.
Do the following when you service this machine:
vKeep the screw kit (for reference the P/N, see “Miscellaneous parts” on page 96) in your tool bag.
vAlways use new screws.
vUse a torque screwdriver if you have one.
Tighten screws as follows:
vPlastic to plastic
Turn an additional 90 degrees after the screw head touches the surface of the plastic part:
vLogic card to plastic
Turn an additional 180 degrees after the screw head touches the surface of the logic card:
vTorque driver
If you have a torque driver, refer to the “Torque” column for each step.
vMake sure you use the correct screw. If you have a torque screwdriver, tighten all screws firmly to the torque shown in the table. Never use a screw that you removed. Use a new one. Make sure the screws are tightened firmly.
Retaining serial numbers
This section includes the following descriptions:
v“Restoring the serial number of the system unit” on page 49
v“Retaining the UUID” on page 49
