Lenovo B490 Hardware Maintenance Manual - Page 5

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About this manual This manual provides service and reference information for the following Lenovo® products. Machine Lenovo B490 Machine type (MT) 3756, 3772, 20205, 20207 Use this manual to troubleshoot problems. The manual is divided into the following sections: • The common sections provide general information, guidelines, and safety information required for servicing computers. • The product-specific section includes service, reference, and product-specific parts information. Important: • This manual is intended only for trained service technicians who are familiar with Lenovo products. Use this manual to troubleshoot problems effectively. • Before servicing a Lenovo product, be sure to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 27. © Copyright Lenovo 2012 iii

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About this manual
This manual provides service and reference information for the following Lenovo
®
products.
Machine
Machine type (MT)
Lenovo B490
3756, 3772, 20205, 20207
Use this manual to troubleshoot problems.
The manual is divided into the following sections:
•
The common sections provide general information, guidelines, and safety information required for
servicing computers.
•
The product-specific section includes service, reference, and product-specific parts information.
Important:
•
This manual is intended only for trained service technicians who are familiar with Lenovo products. Use
this manual to troubleshoot problems effectively.
•
Before servicing a Lenovo product, be sure to read all the information under Chapter 1 “Safety
information” on page 1 and Chapter 2 “Important service information” on page 27.
© Copyright Lenovo 2012
iii