Lenovo B490 Support Question
Lenovo B490 Support Question
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Current Answers
Answer #1: Posted by SonuKumar on March 7th, 2023 7:41 AM
SonuKumar
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Enter Boot Menu with Function Key or Novo Button. Option 1: Plug in bootable USB disk (USB Stick). Restart the PC and press F12 (Fn+F12) during power-on
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Related Lenovo B490 Manual Pages
Hardware Maintenance Manual - Page 2
... "GSA" contract, use, reproduction, or disclosure is subject to read the general information under Appendix A "Notices" on page 93. First Edition (October 2012) © Copyright Lenovo 2012.
GS-35F-05925. Note: Before using this information and the product it supports, be sure to restrictions set forth in Contract No.
Hardware Maintenance Manual - Page 3
...Hibernation mode 35
Chapter 5. Notices 93
Electronic emissions notices 94 Trademarks 94
© Copyright Lenovo 2012
i Important service information 27
Strategy for replacing FRUs 27 Strategy for replacing a ...cover . . . 75
Chapter 8. Lenovo B490 37
Specifications 37 Status indicators 38 Fn key combinations 39
Chapter 6. FRU replacement notices 41
Screw notices 41
Chapter 7.
Hardware Maintenance Manual - Page 5
... provide general information, guidelines, and safety information required 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 - Page 7
...without slipping. 2. Distribute the weight of internal components. Never move suddenly or twist when you service a Lenovo Notebook. • "General safety" on page 1 • "Electrical safety" on page 2 •... Keep your sleeves are fastened or rolled up with labels or stickers.
© Copyright Lenovo 2012
1 Make sure that causes hazards to your eyes. • After service, reinstall...
Hardware Maintenance Manual - Page 9
...any unsafe conditions are present, you must not be considered sensitive to attachment of non-Lenovo features or options not covered by equalizing the charge so that the machine, the ...identifying potentially unsafe conditions. Begin the checks with .
Check that are any obvious non-Lenovo alterations. Handling devices that the power-supply cover fasteners (screws or rivets) have not...
Hardware Maintenance Manual - Page 33
...the replacement does not correct the problem, reinstall
the original FRU before you are available at http://www.lenovo.com/support. "Strategy for replacing a system board" on page 28 • "Important information about ...information that board, and then replace the other one.
© Copyright Lenovo 2012
27 The Web site offers three options to all software fixes, drivers, and BIOS downloads...
Hardware Maintenance Manual - Page 34
...handling of any of the FRUs may be lost. RoHS requirements must be ready to meet Lenovo's requirements and schedule in the European Union. If the original FRU parts are identified by one...numbers automatically shipped by the distribution center at each BGA (Ball Grid Array) chipset. Lenovo plans to transit to RoHS compliance before doing this task.
Attention: The drive startup ...
Hardware Maintenance Manual - Page 35
... a FRU, make sure that you go to the checkout guide, be overwritten. • Replace a FRU only with another FRU of an optical drive
© Copyright Lenovo 2012
29
Procedure index and page number in the parts exchange form or parts return form that a FRU is a list of some symptoms that might...
Hardware Maintenance Manual - Page 36
... not charge during operation, go to Chapter 5 "Lenovo B490" on the computer. If the voltage is supplied ...keyboard • Use of an incorrect ac power adapter on laptop products
The following power supply checkouts: • "Checking the...8226; Forgotten computer password (making the computer unusable) • Sticky keys caused by nonwarranted activities: • Missing parts might be a ...
Hardware Maintenance Manual - Page 39
... Windows recovery program enables you have stored on password and the supervisor password.
© Copyright Lenovo 2012
33 Changing the startup settings of the hard disk drive, restore only the desired files...computer settings will be restored to do the following recovery programs are available for a Lenovo notebook computer: the power-on the hard disk drive will be deleted and the ...
Hardware Maintenance Manual - Page 40
...The system board must enter the supervisor password to get access to reset the password.
If any key. • You have pressed Fn+F2. To end screen blank mode and resume normal operation,...prompt will be started .
Sleep mode
When the computer enters sleep mode, the following : • Press the Fn key. • Open the LCD cover. • Turn on the "Turn off . • The hard disk ...
Hardware Maintenance Manual - Page 41
...; The system is restored from the hard disk drive. Note: The computer does not accept any action to go into hibernation mode automatically in the boot record on the resume timer elapses, the computer automatically returns from hibernation mode and resumes operation. Related service information 35
The hibernation file in either...
Hardware Maintenance Manual - Page 43
...for cache 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 ... 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 - Page 44
... uppercase directly. Status indicators Indicator 1 Caps Lock
Meaning
White: Caps Lock mode is enabled. To enable or disable Caps Lock mode, press the Caps Lock key.
2 Numeric Lock
White: The separate numeric keypad on some models) • Integrated WiMAX • 100/1000 Mbps Ethernet communication
Security feature
Fingerprint Reader (on the...
Hardware Maintenance Manual - Page 45
...80%, and charging is continuing. Enables or disables the built-in wireless networking features. Lenovo B490 39 When the battery charge level reaches 20%, the blinking color changes to switch ... display and an external monitor. Has the same function as the SysRq key on a conventional keyboard.
Fn key combinations
The following table describes the functions of the computer screen. Table ...
Hardware Maintenance Manual - Page 46
Fn+PgDn
Activates the insert function.
Fn + left/right arrow
Increases or decreases the sound volume.
40 Hardware Maintenance Manual Fn + up/down arrow
Increases or decreases the display brightness level. Table 2. Function key combinations (continued)
Key combination
Description
Fn+End
Has the same function as the Break key on a conventional keyboard.
Hardware Maintenance Manual - Page 76
..., stating the original location of the label on the computer and the information on the label, such as the part number, serial number, and product key.
Note: If you replace the base cover. Removal steps of DC-in connector and base cover Remove the screws 1 , and then remove the DC-in...
Hardware Maintenance Manual - Page 83
Locations
This chapter presents the locations of the indicators, see "Status indicators" on page 38.
© Copyright Lenovo 2012
77 Lenovo B490 front view
1 Integrated camera (on some models) 2 Wireless module antennas 3 Status indicators 1 4 Speakers 5 Media card reader slot
6 Touch pad and touch pad buttons 7 Power and ...
Hardware Maintenance Manual - Page 84
Right-side view
Figure 2. Lenovo B490 right-side view 1 Combo audio jack 2 USB connector 3 Optical drive
Bottom and left -side view
1 Battery latch 2 Battery pack... disk drive, and wireless cards are located underneath the bottom slot cover.
78 Hardware Maintenance Manual Lenovo B490 bottom and left -side view
45 3 12
4 USB connector 5 ac power connector
1 2 3
10
4 5
8 76 9
Figure 3.
Hardware Maintenance Manual - Page 89
... N
102500228 N
102500018 N
102500017 N
102500016 N
102500015 N
102001065 N
102500230 N
102500101 N
102500133 N
102500350 N
102500301 N
102500303 N
102500362 N
102500440 N
102500433 N
102500421 N
102500435 N
90000220 N
90000979 N
LCD FRUs
In Lenovo B490 models, the type of LCD is 14-inch high definition (HD) TFT LCD (Table 4 "Parts list LCD" on page 85.) - Chapter 9.
FRU...
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