About This Manual - Lenovo ThinkPad Hardware Maintenance Manual

P1 gen 4 and x1 extreme gen 4

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About this manual

This manual contains service and reference information for the following ThinkPad

ThinkPad P1 Gen 4

ThinkPad X1 Extreme Gen 4

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

• 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.

• Depending on the model, some hardware configuration and software programs might not be available on

the computer. Some statements in this manual might not be applicable to the computer.

• Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 "Safety

information" on page 1 and Chapter 2 "Important service information" on page 21.

Machine Types: 20Y3 and 20Y4

Machine Types: 20Y5 and 20Y6

products.

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