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...

Hardware Maintenance Manual
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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...

Hardware Maintenance Manual
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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...

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...

Hardware Maintenance Manual
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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....

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. 

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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...

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...

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21 SATA connector
22 LED panel connector