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About this manual
®
This manual contains service and reference information for the following ThinkPad
products:
®
ThinkPad Yoga
370
Machine types (MT) 20JH, 20JJ, 20JK, and 20JL
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 Chapter 1 "Safety information"
on page 1 and Chapter 2 "Important service information" on page 19.
© Copyright Lenovo 2017
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