Hardware Maintenance Manual
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... 2040 Antenna assembly and LCD rear cover . . . 75 Chapter 8. Notices 93 Electronic emissions notices 94 Trademarks 94 © Copyright Lenovo 2012 i Related service information 33 Recovering the computer settings 33 Passwords 33 Power-on password 34 Supervisor password 34 Power management 34 Screen... requirements 4 Safety notices (multilingual translations) . . . . . 4 Laser compliance statement (multilingual translations 19 Chapter 2. Contents About this manual iii Chapter 1. Lenovo B490 37 Specifications 37 Status indicators 38 Fn key combinations 39 Chapter 6.
... 2040 Antenna assembly and LCD rear cover . . . 75 Chapter 8. Notices 93 Electronic emissions notices 94 Trademarks 94 © Copyright Lenovo 2012 i Related service information 33 Recovering the computer settings 33 Passwords 33 Power-on password 34 Supervisor password 34 Power management 34 Screen... requirements 4 Safety notices (multilingual translations) . . . . . 4 Laser compliance statement (multilingual translations 19 Chapter 2. Contents About this manual iii Chapter 1. Lenovo B490 37 Specifications 37 Status indicators 38 Fn key combinations 39 Chapter 6.
Hardware Maintenance Manual
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..., be sure to troubleshoot problems. The manual is intended only for servicing computers. • The product-specific section includes service, reference, and product-specific parts information. Machine Lenovo B490 Machine type (MT) 3756, 3772, 20205, 20207 Use this manual to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service...
..., be sure to troubleshoot problems. The manual is intended only for servicing computers. • The product-specific section includes service, reference, and product-specific parts information. Machine Lenovo B490 Machine type (MT) 3756, 3772, 20205, 20207 Use this manual to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service...
Hardware Maintenance Manual
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... must determine how serious the apparent hazard could be the type specified in identifying potentially unsafe conditions. Check for any obvious non-Lenovo alterations. Notes: 1. c. Check inside the unit for any obvious unsafe conditions, such as to attachment of any potentially unsafe ... batteries. 5. Use good judgment as metal filings, contamination, water or other liquids, or signs of every service task. Use product-specific ESD procedures when they present: • Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal ...
... must determine how serious the apparent hazard could be the type specified in identifying potentially unsafe conditions. Check for any obvious non-Lenovo alterations. Notes: 1. c. Check inside the unit for any obvious unsafe conditions, such as to attachment of any potentially unsafe ... batteries. 5. Use good judgment as metal filings, contamination, water or other liquids, or signs of every service task. Use product-specific ESD procedures when they present: • Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal ...
Hardware Maintenance Manual
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.... Use the round ground prong of a grounding system to eliminate static on ac-operated computers. When working on these systems. - Make sure that meets the specific service requirement. Most clothing is desirable but not necessary. - The mat is required for operator safety and correct system function. You can be verified by...
.... Use the round ground prong of a grounding system to eliminate static on ac-operated computers. When working on these systems. - Make sure that meets the specific service requirement. Most clothing is desirable but not necessary. - The mat is required for operator safety and correct system function. You can be verified by...
Hardware Maintenance Manual
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... only) Display • Size: 14.0 inches (356 mm) • Resolution: - Lenovo B490 This chapter presents the following product-specific service references and parts information: • "Specifications" on page 37 • "Status indicators" on page 38 • "Fn key combinations" on some models for the Lenovo B490 models. Processor • Windows 7: To view the system properties of...
... only) Display • Size: 14.0 inches (356 mm) • Resolution: - Lenovo B490 This chapter presents the following product-specific service references and parts information: • "Specifications" on page 37 • "Status indicators" on page 38 • "Fn key combinations" on some models for the Lenovo B490 models. Processor • Windows 7: To view the system properties of...
Hardware Maintenance Manual
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It is recommended to use the correct screw. If you use new screws for each step. • Make sure that you have a torque screwdriver, refer to the torque specified in the screw information table for each step. • Ensure torque screw drivers are calibrated correctly following country specifications. 42 Hardware Maintenance Manual • Torque driver If you have a torque screwdriver, tighten all screws firmly to the Torque column in the screw information table for replacements.
It is recommended to use the correct screw. If you use new screws for each step. • Make sure that you have a torque screwdriver, refer to the torque specified in the screw information table for each step. • Ensure torque screw drivers are calibrated correctly following country specifications. 42 Hardware Maintenance Manual • Torque driver If you have a torque screwdriver, tighten all screws firmly to the Torque column in the screw information table for replacements.
Hardware Maintenance Manual
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...A CRU is your product and are concealed by an access panel that the part is typically secured by no more than two screws. Lenovo computers contain the following lists of this Hardware Maintenance Manual. Examples of these types of self-service CRUs is identified by a single asterisk ...(*) or two asterisks (**) in the CRU ID column means that is not a CRU. Once the access panel is removed, the specific CRU is required: (1) return instructions, a prepaid shipping label, and a container will ship the CRU to return the defective CRU. An electronic version...
...A CRU is your product and are concealed by an access panel that the part is typically secured by no more than two screws. Lenovo computers contain the following lists of this Hardware Maintenance Manual. Examples of these types of self-service CRUs is identified by a single asterisk ...(*) or two asterisks (**) in the CRU ID column means that is not a CRU. Once the access panel is removed, the specific CRU is required: (1) return instructions, a prepaid shipping label, and a container will ship the CRU to return the defective CRU. An electronic version...
Hardware Maintenance Manual
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...generally available systems. Furthermore, some measurements may be used instead. Users of Lenovo or third parties. Consult your local Lenovo representative for their specific environment. © Copyright Lenovo 2012 93 Any functionally equivalent product, program, or service that these changes...have been estimated through extrapolation. Appendix A. Notices Lenovo may vary. The information contained in this document in this document does not affect or change Lenovo product specifications or warranties. Nothing in this Lenovo product, and use in a controlled environment. ...
...generally available systems. Furthermore, some measurements may be used instead. Users of Lenovo or third parties. Consult your local Lenovo representative for their specific environment. © Copyright Lenovo 2012 93 Any functionally equivalent product, program, or service that these changes...have been estimated through extrapolation. Appendix A. Notices Lenovo may vary. The information contained in this document in this document does not affect or change Lenovo product specifications or warranties. Nothing in this Lenovo product, and use in a controlled environment. ...