A SERVICE OF

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About this manual
This manual contains service and reference information for the following
ThinkPad
®
products.
ThinkPad X301
MT 2774, 2776, 2777, 2778, 2779, 4057, and 4182
Use this manual along with the advanced diagnostic tests to troubleshoot
problems.
Important:
This manual is intended only for trained service technicians who are familiar
with ThinkPad products. Use this manual along with the advanced diagnostic
tests to troubleshoot problems effectively.
Before servicing a ThinkPad product, be sure to read all the information under
“Safety information” on page 1 and “Important service information” on page 39.
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