Lenovo N 500 Service Manual

Lenovo 3000 N500 
This chapter presents following product-specific service references and 
product-specific parts information. 
v   
 “Specifications” 
v 
 
 “Status indicators” on page 45 
v 
 
 “FRU tests” on page 47 
v 
 
 “Fn key combinations” on page 48 
v 
 
 “FRU replacement notices” on page 49 
v 
 
 “Removing and replacing a FRU” on page 53 
v 
 
 “Locations” on page 93 
v 
 
 “Parts list” on page 96
Specifications 
The following table lists the specifications of the Lenovo 3000 N500 : 
 Table...

Table 6. Specifications (continued) 
Feature Description 
Standard memory v   
 1-GB DDR2-667 SDRAM SO-DIMM (PC2-5300) card × 1 
v 
 
 2-GB DDR2-667 SDRAM SO-DIMM (PC2-5300) card × 1 
Optional memory v 
 
 1-GB DDR2-667 SDRAM SO-DIMM (PC2-5300) card × 1 
v 
 
 2-GB DDR2-667 SDRAM SO-DIMM (PC2-5300) card × 1
(maximum
 of 4.0 GB) 
CMOS RAM v   
 242 bytes 
Hard disk drive v 
 
 160 GB, 5400 rpm, 9.5 mm high, S ATA interface 
v 
 
 250 GB, 5400 rpm, 9.5 mm high, S ATA interface 
v 
 
 320 GB, 5400 rpm, 9.5...

Status indicators 
The system status indicators show the status of the computer, as follows: 
1
2
3
4
7
6
5
   
 
 Table 7. Status indicators 
Indicator Meaning 

1 Drive in use Blue: Data is being read from or written to the hard disk 
drive, the solid state drive, or the optical disk drive. 
When this indicator is on, do not put the computer into 
standby mode or turn off the computer.
Note:
 Do not move the system while the green drive-in-use light 
is on. Sudden physical shock could cause drive...

Table 7. Status indicators (continued) 
Indicator Meaning 

6 Battery status Blue: The battery is charged to 95% or more of its capacity. 
Blinking blue: 
The battery is being trickle-charged. 
Orange: 
The battery is being normally charged. 
Off: The computer is operating on battery power, and the 
battery has enough power. 
Blinking orange: 
The computer is operating on battery power, and the 
battery is charged to no more than 8% of capacity. 

7 Power on Blue: The computer is on and ready to use....

FRU tests 
The following table shows the test for each FRU. 
 Table 8. FRU tests 
FRU Applicable test 
System board 1.   
 Diagnostics --> CPU/Coprocessor 
2. 
 
 Diagnostics --> Systemboard 
LCD unit 1. 
 
 Diagnostics --> Video Adapter 
2. 
 
 Interactive Tests --> Video 
Keyboard 1. 
 
 Diagnostics --> Systemboard --> Keyboard 
2. 
 
 Interactive Tests --> Keyboard 
Hard disk drive Diagnostics --> Fixed Disks 
Diskette drive Diagnostics --> Diskette Drives 
Memory 1. 
 
 If two DIMMs are installed,...

Fn key combinations 
The following table shows the function of each combination of Fn with a function 
key. 
 Table 9. Fn key combinations 
Key combination Description 
Fn+F1 Volume down. 
Fn+F2 Volume up. 
Fn+F3 Reserved. 
Fn+F4 Reserved. 
Fn+F5 Enable or disable the built-in wireless networking features and the 
Bluetooth features. If you press Fn+F5, a list of wireless features is 
displayed. Yo u can quickly change the power state of each feature in 
the list. 
Fn+F6 Reserved. 
Fn+F7 Open the window...

FRU replacement notices 
This section contains notices related to removing and replacing parts. Read this 
section carefully before replacing any FRU. 
Screw notices 
Loose screws can cause a reliability problem. In the Lenovo 3000 computer, this 
problem is addressed with special nylon-coated screws that have the following 
characteristics: 
v   
 They maintain tight connections. 
v 
 
 They do not easily come loose, even with shock or vibration. 
v 
 
 They are harder to tighten. 
v 
 
 Each one should...

Retaining serial numbers 
This section includes the following descriptions: 
v   
 “Restoring the serial number of the system unit” 
v 
 
 “Retaining the UUID” 
v 
 
 “Reading or writing the ECA information” on page 52
Restoring the serial number of the system unit 
When the computer was manufactured, the EEPROM on the system board was 
loaded with the serial numbers of the system and all major components. These 
numbers need to remain the same throughout the life of the computer. 
If you replace the...

When you replace the system board, you must set the UUID on the new system 
board as follows: 
1.   
 Install the CE Utility Diskette for Lenovo 3000 notebooks, and restart the 
computer. 
2. 
 
 From the main menu, select 4. Assign UUID. 
A new UUID is created and written. If a valid UUID already exists, it is not 
overwritten.
 
 
Lenovo 3000 N500 51 

Reading or writing the ECA information 
Information on Engineering Change Announcements (ECA) are stored in the 
EEPROM of the system board. The electronic storage of this information simplifies 
the procedure to check if the ECA has been previously applied to a machine. The 
machine does not need to be disassembled to check for the ECA application. 
To check what ECAs have been previously applied to the machine, use the ECA 
Information Read/Write function on the CE Utility Diskette for Lenovo 3000...