IBM N51 Series, Hardware Maintenance Manual

Page: 440 / 503

FRU Removals and Replacements
This section contains information on removals and
replacements, and locations.
Ÿ
The arrows in the removals and replacements show
the direction of movement to remove a field
replaceable unit (FRU), or to turn a screw to release
the FRU. The arrows are marked in numeric order to
show the correct sequence of removal.
Ÿ
When other FRUs must be removed before removing
the failing FRU, they are listed at the top of the page.
Go to the removal procedure for each FRU listed,
remove the FRU, and then continue with the removal
of the failing FRU.
Ÿ
To replace a FRU, reverse the removal procedure
and follow any notes that pertain to replacement.
See “Locations” on page 450 for internal cable
connections and arrangement information.
CAUTION:
Before removing any FRU, turn off Dock II, remove the
computer, unplug all power cords from electrical
outlets, then disconnect any interconnecting cables.
CAUTION:
In the U.K., by law, the telephone cable must be
connected after or disconnected before the power
cord.
Warning: The main board, adapters, and circuit boards
on the drives are sensitive to, and can be damaged by,
electrostatic discharge. Establish personal grounding by
touching a ground point with one hand before touching
these units.
Note: An electrostatic discharge (ESD) strap must be
used to establish personal grounding.
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IBM Mobile Systems HMM - Volume 1