Lenovo B305 Service Manual

							Chapter 5. Using the Setup Utility
      19
Selecting a startup device
If your computer does not start up (boot) from a device such as the 
CD-ROM, diskette, or hard disk as expected, use one of the following 
procedures to select a startup device.
Selecting a temporary startup device
Use this procedure to startup from any boot device.
Note: Not all CDs, hard disks, and diskettes are bootable.
1.  Turn off your computer.
2.  Press and hold the F12 key then turn on the computer. When the 
Startup Device Menu appears, release the F12 key.
Note:  If you are using a USB keyboard and the Startup Device Menu 
does not display using this method, repeatedly press and release 
the F12 key rather than leaving it pressed when turning on the 
computer.
3.  Select the desired startup device from the Startup Device Menu and 
press Enter to begin.
Note:  Selecting a startup device from the Startup Device menu does 
not permanently change the startup sequence.
Selecting or changing the startup device sequence
To view or permanently change the configured startup device sequence, 
do the following:
1. Start the Setup Utility program (see “Starting the Setup Utility program” 
on page 15).
2.  Select Start Up.
3.  Select Quick Boot Mode, Numlock, Option Keys Display, Option Keys 
Display Style or Startup Device Menu Prompt to set these devices.
4.  Select Disabled or Enabled and press Enter. 
5.  Press ESC to return to Exit and select Save changes and Exit.
If you have changed these settings and want to return to the default 
settings, select Load Optimal Defaults on the Setup Utility menu. 
						

							Hardware Maintenance Manual
20      
Exiting from the Setup Utility program
When you finish viewing or changing settings, press Esc to return to the 
Setup Utility program menu (you might have to press Esc several times). 
If you want to save the new settings, select Save changes and Exit before 
you exit. Otherwise, your changes will not be saved. 
						

							Chapter 6. Symptom-to-FRU Index
      21
Symptom-to-FRU Index
6
The Symptom-to-FRU index lists error symptoms and possible causes. 
The most likely cause is listed first. Always begin with Chapter 4, “General 
Checkout,” on page 13. This index can also be used to help you decide 
which FRUs to have available when servicing a computer. If you are unable 
to correct the problem using this index, go to “Undetermined problems” 
on page 24.Notes
•	 If	you	have	both	an	error	message	and	an	incorrect	audio	response	diagnose the error message first.
•	 If	you	cannot	run	the	diagnostic	tests	or	you	get	a	diagnostic	error	 code when running a test but did receive a POST error message 
diagnose the POST error message first.
•	 If	you	did	not	receive	any	error	message	look	for	a	description	of	 your error symptoms in the first part of this index.
Hard disk drive boot error
A hard disk drive boot error (error codes 1962 and I999030X) can have the 
following causes.
Error FRU/Action
The start-up drive is not in the boot 
sequence in configuration. Check the configuration and ensure 
the start-up drive is in the boot 
sequence.
No operating system installed on 
the boot drive. Install an operating system on the 
boot drive. 
						

							Hardware Maintenance Manual
22      
ErrorFRU/Action
The boot sector on the start-up 
drive is corrupted. The drive must be formatted do the 
following:
1.   
Attempt to back-up the data on 
the failing hard disk drive. 
2.    Using the operating systems 
programs format the hard disk 
drive.
The drive is defective. Replace the hard disk drive.
Power Supply Problems
If you suspect a power problem, use the following procedures.
Check/VerifyFRU/Action
Check the following for proper 
installation.  Power Cord
• 
On/Off Switch connector
• 
On/Off Switch Power Supply 
• 
connector
System Board Power Supply 
• 
connectors
Microprocessor(s) connection
•  Reseat connectors
Check the power cord for continuity. Power Cord
Check the power-on switch for 
continuity. Power-on Switch
POST error codes
Each time you power-on the system, it performs a series of tests that 
check the operation of the system and some options. This series of tests is 
called the Power-On Self-Test, or POST. POST does the following operations.
•	 Checks	some	basic	system-board	operations
•	 Checks	the	memory	operation
•	 Starts	the	video	operation
•	 Verifies	that	the	boot	drive	is	working
If the POST detects a problem, an error message appears on the screen. A 
single problem can cause several error messages to appear. When you correct 
the cause of the first error message, the other error messages probably will 
not appear on the screen the next time you turn on the system. 
						

							Chapter 6. Symptom-to-FRU Index
      23
POST Error MessageDescription/Action
CMOS Date/Time Not Set The CMOS Date and/or Time are 
invalid. This error can be resolved 
by readjusting the system time in 
Phenix BIOS Setup.
CMOS Battery Low The CMOS battery is no longer 
functional.
Replace the battery.
CMOS Checksum Bad  Checksum of CMOS is incorrect.
The computer loads the default 
configuration settings. This error 
might indicate that CMOS has 
become corrupt due to a weak 
CMOS battery.
Primary Master Hard Disk Error The IDE/ATAPI device configured 
as Primary Master/Primary Slave/
Secondary Master/Secondary Slave 
could not be found or initialized. 
Make sure the hard drive is correctly 
installed.
Primary Slave Hard Disk Error
Secondary Master Hard Disk Error
Secondary Slave Hard Disk Error
Keyboard error
Cannot initialize the keyboard.
Make sure the keyboard is properly 
connected to the computer and 
that no keys are held pressed during 
POST.
To purposely configure the 
computer without a keyboard, set 
keyboardless operation in Setup to 
Enable. The BIOS then ignores the 
missing keyboard during POST.
System Halted The system has been halted. A reset 
or power cycle is required to reboot 
the machine. This message appears 
after a fatal error has been detected.
Reboot and Select proper Boot 
device or Insert Boot Media in 
selected Boot device The BIOS was unable to find a 
suitable boot device.
Make sure the boot drive is properly 
connected to the computer.
Make sure you have bootable 
media. 
						

							Hardware Maintenance Manual
24      
Undetermined problems
If this computer has a parallel ATA hard disk drive, make sure that the hard 
disk drive is jumpered as a master and the optical drive is jumpered as a 
slave.
1. Power-off the computer.
2.  Remove or disconnect the following components (if installed) one at a 
time.
a.  External devices (modem, printer, or mouse)
b.  Any adapters
c.  Memory modules
d.  Extended video memory
e.  External Cache
f.  External Cache RAM
g.  Hard disk drive
h.  Diskette drive
3.  Power-on the computer to re-test the system.
4.  Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem 
continues, replace the system board. 
						

							Chapter 7. Locations
      25
Locations
7
This section provides illustrations to help locate the various connectors, 
controls and components of the computer. 
Locating components and connectors
The following illustrations will help you to locate the various components 
and connectors in your computer. 
Internal components
The following illustration shows the components inside your computer. 
						

							Hardware Maintenance Manual
26      
1 Computer stand  
2 Computer cover
3 Motherboard
4 Shell
5 Plastic frame
6 Chassis
7 LED panel 
8 Front bezel
9 Camera 
10 Optical disk drive
11 Hard disk drive
12 Motherboard cover
13 System fan
14 Heatsink
15 Function panel
16 Invert board
17 WLAN module
18 Bluetooth module
19 Speakers
Identifying parts on the motherboard
The motherboard (sometimes called the planar or system board) is the 
main circuit board in your computer. It provides basic computer functions 
and supports a variety of devices that are factory-installed or that you can 
install later.
The following illustration shows the locations of parts on the 
motherboard. 
						

							Chapter 7. Locations
      27
1819 20
21
22
17 3
12
45
6
7
8
9
10
1 1
12
13
14
15
16
1 Memory module connector
2 Camera connector
3 Microprocessor
4 Card reader connector
5 USB connector
6 Headphone connector
7 Microphone connector
8 USB connector
9 Speaker connectors
10 USB connectors (4)
11 Ethernet connector
12 1394 connector
13 PS/2 keyboard connector
14 Power connector
15 WLAN connector
16 TV tuner card connector
17 Power button connector
18 Function panel connector
19 SATA power connector
20 System fan connector 
						

							Hardware Maintenance Manual
28      
21 SATA connector
22 LED panel connector