IBM ThinkPad T40 series, Hardware Maintenance Manual

Page: 156 / 188

v
Each FRU is available for all types or models, unless
specific types or models are specified.
v
A CRU (customer-replaceable unit) is identified by a
single asterisk (*) or two asterisks (**) in the CRU ID
column. An N in the CRU ID column means that the part
is not a CRU. A single asterisk (*) means that the part is
a Tier 1 CRU; two asterisks (**) mean that the part is a
Tier 2 CRU.
Tier 1 CRU:
(Example: Mouse, external keyboard, and hard disk
drive with coin screw)
– NO TOOLS ARE REQUIRED.
– A coin or a thumb screw is acceptable.
– Minimal technical expertise is required.
– Minimal problem determination is required—less than
5 minutes.
Tier 2 CRU:
(Example: Adapter card, ThinkPad memory)
– Up to 4 screws or fasteners have to be removed.
– Some technical experience is required.
– HelpCenter assistance may be used.
– Problem determination can be done by the customer,
either on site or with HelpCenter assistance.
v
FRUs marked with
OP
are available as options.
Parts list
152
MT 2373/2374/2375/2376/2378/2379