About this manual

This manual contains service and reference information for the following

ThinkPad® products.

ThinkPad T400

MT 2764, 2765, 2766, 2767, 2768, 2769, 2773, 6473, 6474, 6475, 7417, 7420, 7425, and 7434

ThinkPad R400

MT 2782, 2783, 2784, 2786, 2787, 2788, 2789, 7438, 7439, 7440, 7443, 7445, 7446, and 7447

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

The manual is divided into sections as follows:

vThe common sections provide general information, guidelines, and safety information required in servicing computers.

vThe 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.

© Copyright Lenovo 2008, 2009

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IBM manual ThinkPad T400, ThinkPad R400