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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.
The manual is divided into sections as follows:
v The common sections provide general information, guidelines, and safety
information required in servicing computers.
v The product-specific section includes service, reference, and product-specific
parts information.
Important:
This manual is intended only for trained servicers 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 17.
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