This section contains information about removals and
replacements.
Do not damage any parts. Only certified and trained
personnel should service the computer.
The arrows in this section show the direction of
movement to remove a FRU, or to turn a screw to
release the FRU. The arrows are marked in numeric
order, in square callouts, to show the correct
sequence of removal.
Any FRUs that must be removed in order to remove
the failing FRU are listed at the top of the page.
To replace a FRU, reverse the removal procedure
and follow any notes that pertain to replacement.
See “Locations” on page 65 for internal cable
connections and arrangement information.
When replacing a FRU, use the correct screw size, as
shown in the procedure.
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:
The battery pack contains small amounts of nickel. Do
not disassemble it, throw it into fire or water, or short-
circuit it. Dispose of the battery pack as required by
local ordinances or regulations.
Warning: Before the computer is powered-on after FRU
replacement, make sure all screws, springs, or other small
parts, are in place and are not left loose inside the
computer. Verify this by shaking the computer and
listening for rattling sounds. Metallic parts or metal flakes
can cause electrical short circuits.
Warning: The system board is sensitive to, and can be
damaged by electronic discharge. Establish personal
grounding by touching a ground point with one hand before
touching these units. An electrostatic discharge (ESD)
strap must be used to establish personal grounding.
ThinkPad 310, 310D, 310E, 310ED (2600) 33