Toshiba Nb305 Manual

							User’s Manual8-9
Optional Devices
Security lock
A security locks enable you to anchor your computer to a desk or other 
heavy object in order to help prevent unauthorized removal or theft. The 
computer has a security lock slot on its right side into which you can attach 
one end of the security cable, while the other end attaches to a desk or 
similar object. The methods used for attaching security cables differ from 
product to product. Please refer to the instructions for the product you are 
using for more information.
Connecting the security lock
In order to connect a security cable to the computer, follow the steps as 
detailed below:
1. Turn the computer so its right hand side faces you.
2. Align the security cable with the lock hole and secure it in place.
1. Security lock slot
2. Security lock
Security lock
1
2 
						

							User’s Manual9-1
Troubleshooting
Chapter 9
Troubleshooting
TOSHIBA designed the computer for durability. However, should problems 
occur, following the procedures in this chapter can help to determine the 
cause.
All readers should become familiar with this chapter. Knowing what might 
go wrong can help prevent problems from occurring.
Problem solving process
Resolving problems will be much easier if you observe the following 
guidelines:
■Stop immediately when you recognize a problem exists. Further action 
may result in data loss or damage. You may destroy valuable problem-
related information that can help solve the problem.
■Observe what is happening. Write down what the system is doing and 
what actions you performed immediately before the problem occurred. 
If you have a printer attached, print a copy of the screen using the 
PRTSC (Print Screen) key.
The questions and procedures offered in this chapter are meant as a guide, 
they are not definitive problem solving techniques. Many problems can be 
solved simply, but a few may require help from your dealer. If you find you 
need to consult your dealer or others, be prepared to describe the problem 
in as much detail as possible.
Preliminary checklist
Consider the simplest solution first. The items in this checklist are easy to 
fix and yet can cause what appears to be a serious problem.
■Make sure you turn on all peripheral devices before you turn on the 
computer. This includes your printer and any other external device you 
are using.
■Before you attach an external device, turn the computer off. When you 
turn the computer back on it recognizes the new device.
■Make sure all options are set properly in the setup program.
■Check all cables. Are they correctly and firmly attached? Loose cables 
can cause signal errors. 
						

							User’s Manual9-2
Troubleshooting
■Inspect all connecting cables for loose wires and all connectors for 
loose pins.
■Check that your diskette is correctly inserted and that the diskette’s 
write protect tab is correctly set.
Make notes of your observations and keep them in a permanent error log. 
This will help you describe your problems to your dealer. If a problem 
recurs, the log will help you identify the problem faster.
Analyzing the problem
Sometimes the system gives clues that can help you identify why it is 
malfunctioning. Keep the following questions in mind:
■Which part of the system is not operating properly: keyboard, diskette 
drives, hard disk drive, printer, display. Each device produces different 
symptoms.
■Is the operating system configuration set properly? Check the 
configuration options.
■What appears on the display screen? Does it display any messages or 
random characters? Print a copy of the screen if you have a printer 
attached. Look up the messages in the software and operating system 
documentation. Check that all connecting cables are correctly and 
firmly attached. Loose cables can cause erroneous or intermittent 
signals.
■Do any icons light? Which ones? What color are they? Do they stay on 
or blink? Write down what you see.
Record your observations so you can describe them to your dealer.
SoftwareThe problems may be caused by your software or diskette. If 
you cannot load a software package, the media (usually a 
diskette) may be damaged or the program might be 
corrupted. Try loading another copy of the software.
If an error message appears while you are using a software 
package, check the software documentation. These 
documents usually include a problem solving section or a 
summary of error messages.
Next, check any error messages in the OS documentation.
HardwareIf you cannot find a software problem, check your hardware. 
First run through the items in the preliminary checklist 
above. If you still cannot correct the problem, try to identify 
the source. The next section provides checklists for 
individual components and peripherals. 
						

							User’s Manual9-3
Troubleshooting
Hardware and system checklist
This section discusses problems caused by your computers hardware or 
attached peripherals. Basic problems may occur in the following areas:
System start-up 
When the computer does not start properly, check the following items:
■Self Test
■Power Sources
■Power-on Password 
Self test 
When the computer starts up, the self-test will be run automatically, and the 
following will be displayed:
This message remains on the screen for a few seconds.
If the self test is successful, the computer tries to load the operating system.
Depending on how the Boot Priority is set in the Hardware Setup, the 
computer tries to load first from drive A then from drive C, or first from drive 
C then from drive A.
If any of the following conditions are present, the self test failed:
■The computer stops and does not proceed to display information or 
messages.
■Random characters appear on the screen, and the system does not 
function normally.
■The screen displays an error message.
Turn off the computer and check all cable connections. If the test fails 
again, contact your dealer. ■System start-up
■Self test
■Power 
■Password
■Keyboard
■LCD panel
■Hard disk drive
■Pointing device■Touch pad device
■SD/MultiMedia Card
■External Monitor
■Sound system
■USB
■Standby/Hibernation
■LAN
■Wireless LAN
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							User’s Manual9-4
Troubleshooting
Power 
When the computer is not plugged into an AC adaptor, the battery pack is 
the primary power source. However, your computer has a number of other 
power resources, including intelligent power supply and Real Time Clock 
battery. These resources are interrelated and any one could affect apparent 
power problems. This section provides check lists for AC adaptor and the 
main battery. If you cannot resolve a problem after following them, the 
cause could lie with another power resource. In such case, contact your 
dealer.
Overheating power down
If the computer’s internal temperature becomes too high, the computer will 
automatically shut down.
AC power
If you have trouble turning on the computer with the AC adaptor connected. 
Please refer to Chapter 6, Power and Power-up Modes for more 
information.
Battery
If you suspect a problem with the battery, check the DC IN connect and the 
battery indicator. For information on indicators and battery operation see 
Chapter 6, Power and Power-up Modes.
ProblemProcedure
AC adaptor doesn’t 
power the computer Check the connections. Make sure the cord is 
firmly connected to the computer and a power 
outlet.
Check the condition of the cord and terminals. If 
the cord is frayed or damaged, replace it. If the 
terminals are soiled, wipe them with cotton or a 
clean cloth.
If the AC adaptor still does not power the 
computer, contact your dealer.
ProblemProcedure
Battery doesn’t power 
the computer The battery may be discharged - connect the AC 
adaptor to recharge the battery. 
Battery doesn’t 
charge when the AC 
adaptor is attached 
(Battery indicator 
does not glow amber).If the battery is completely discharged, it will not 
begin charging immediately. Wait a few minutes.
If the battery still does not charge, make sure the 
outlet is supplying power. Test it by plugging in 
an appliance. If it doesn’t work, try another power 
source 
						

							User’s Manual9-5
Troubleshooting
Password
Keyboard
Keyboard problems can be caused by your setup configuration. For more 
information refer to Chapter 5, The Keyboard Chapter 7, HW Setup and 
Passwords.Check whether the battery is hot or cold to the 
touch. If the battery is too hot or too cold, it will 
not charge properly. Make it reach room 
temperature.
Unplug the AC adaptor and remove the battery to 
make sure the terminals are clean. If necessary 
wipe them with a soft dry cloth dipped in alcohol.
Connect the AC adaptor and replace the battery. 
Make sure it is securely seated.
Check the Battery indicator. If it does not glow, 
make the computer charge the battery for at least 
20 minutes. If the Battery indicator glows after 20 
minutes, make the battery continue to charge at 
least another 20 minutes before turning on the 
computer.
If the indicator still does not glow, the batterymay 
be at the end of its operating life. Replace it.
If you do not think the battery is at the end of its 
operating life, see your dealer.
Battery doesn’t power 
the computer as long 
as expectedIf you frequently recharge a partially charged 
battery, the battery might not charge to its full 
potential. Fully discharge the battery, then try to 
charge it again.
Check the power consumption settings in Power 
Management. Consider using a power saving 
mode.
ProblemProcedure
ProblemProcedure
Cannot enter 
passwordRefer to the HW Setup Window section in 
Chapter 7, HW Setup and Passwords.
ProblemProcedure
Some letter keys 
produce numbers Check that the numeric keypad overlay is not 
selected. Press FN+F11 and try typing again. 
						

							User’s Manual9-6
Troubleshooting
LCD panel
Apparent LCD problems may be related to the computer’s setup. Refer to 
Chapter 7, HW Setup and Passwords, for more information.
Hard disk drive
Output to screen is 
garbledMake sure the software you are using is not 
remapping the keyboard. Remapping involves 
reassigning the meaning of each key. See your 
software’s documentation.
If you are still unable to use the keyboard, 
consult your dealer
ProblemProcedure
ProblemProcedure
No displayPress hot keys FN+F5 to change the display 
priority, to make sure it is not set for an external 
monitor.
Markings appear on 
the LCD screen.They might have come from contact with the 
keyboard or touch pad. Try wiping the LCD 
gently with a clean dry cloth. If markings remain, 
use LCD cleaner. Be sure to let the LCD dry 
before closing it.
Problems above 
remain unresolved or 
other problems occurRefer to your software’s documentation to 
determine if the software is causing the difficulty.
Contact your dealer if the problems continue.
ProblemProcedure
Computer does not 
boot from hard disk 
driveCheck if a diskette is in the diskette drive or a 
CD/DVD is in the optical disc drive. Remove any 
diskette and/or CD/DVD and check Boot priority. 
Refer to Chapter 7, Boot Prioritysection.
There may be a problem with your operating 
system files. Refer to your OS documentation.
Slow performanceYour files may be fragmented. Run SCANDISK 
and defragmenter to check the condition of your 
files and disk. Refer to your OS documentation or 
online HELP for information on running 
SCANDISK and the defragmenter.
As a last resort, reformat the hard disk. Then, 
reload the operating system and other files.
If problems persist, contact your dealer. 
						

							User’s Manual9-7
Troubleshooting
Pointing device
If you are using a USB mouse, also refer to the USB section in this chapter 
and to your mouse documentation.
Touch Pad
USB mouse
ProblemProcedure
On-screen pointer 
does not respond to 
Pad operationThe system might be busy. If the pointer is 
shaped as an hourglass, wait for it to resume its 
normal shape and try again to move it.
Double-tapping does 
not workTry changing the double-click speed setting in 
the mouse control utility.
1. Open the Control Panel and Printers and 
Other Hardware, select the Mouse icon and 
press Enter.
2. Click the Buttons tab.
3. Set the double-click speed as instructed and 
click OK.
The mouse pointer 
moves too fast or too 
slowTry changing the speed setting in the mouse 
control utility.
1. Open the Control Panel and Printers and 
Other Hardware, select the Mouse icon and 
press Enter.
2. Click the Pointer Options tab.
3. Set the speed as instructed and click OK.
When the reaction of 
touch pad is sensitive to 
slowAdjust the touch Sensitivity.
1. Open the Control Panel and Printers and 
Other Hardware, select the Mouse icon and 
press Enter.
2. Within the Mouse Properties window, click 
the Device setting tab or Advanced tab.
3. Adjust the touch sensitivity under these tabs.
ProblemProcedure
On-screen pointer 
does not respond to 
mouse operationThe system might be busy. If the pointer is 
shaped as an hourglass, wait for it to resume its 
normal shape and try again to move it.
Make sure the mouse is properly connected to 
the USB port.
Double-clicking does 
not workTry changing the double-click sped setting in the 
mouse control utility 
						

							User’s Manual9-8
Troubleshooting
SD/MuliMedia Card
Refer also to Chapter 8, Optional Devices.
External Monitor
Refer also to Chapter 8, Optional Devices, and to your monitor’s 
documentation.1. Open the Control Panel and Printers and 
Other Hardware, select the Mouse icon and 
press Enter.
2. Click the Buttons tab.
3. Set the double-click speed as instructed and 
click OK.
The mouse pointer 
moves too fast or too 
slowTry changing the speed setting in the mouse 
control utility.
1. Open the Control Panel and Printers and 
Other Hardware, select the Mouse icon and 
press Enter.
2. Click the Pointer Options tab.
3. Set the speed as instructed and click OK.
The mouse pointer 
moves erraticallyThe mouse might be dirty. Refer to your mouse 
documentations for instructions on cleaning.
If problems persist, contact your dealer.
ProblemProcedure
ProblemProcedure
Memory card error 
occursReseat the memory card to make sure it is firmly 
connected.
Check the card’s documentation.
You cannot write to 
the memory cardMake sure the card is not write protected.
You cannot read a fileMake sure the target file is on the memory card 
inserted in the slot.
If problems persist, contact your dealer.
ProblemProcedure
Monitor does not turn 
on Make sure that the external monitor’s power 
switch is on. Confirm that the external monitor’s 
power cable is plugged into a working power 
outlet. 
						

							User’s Manual9-9
Troubleshooting
Sound system
USB
Refer also to your USB device’s documentation. No displayTry adjusting the contrast and brightness 
controls on the external monitor.
Press hot keys FN+F5 to change the display 
priority and make sure it is not set for the internal 
display.
Display error occursCheck that the cable connecting the external 
monitor to the computer is attached firmly.
If problems persist, contact your dealer.
ProblemProcedure
ProblemProcedure
No sound is heardCheck the software volume settings.
Make sure the headphone connection is secure.
Check Sound Preferences. Make sure the sound 
function is enabled and that settings for I/O 
address, Interrupt level and DMA are correct for 
your software and do not conflict with other 
hardware devices that you may have connected 
to the computer.
If problems persist, contact your dealer.
ProblemProcedure
USB device does not 
workCheck for a firm cable connection between the 
USB ports on the computer and the USB device.
Make sure the USB device drivers are properly 
installed. Refer to your Windows documentation 
for information on checking the drivers.
If you are using an operating system that does 
not support USB, you can still use a USB mouse 
and/or USB keyboard. If these devices do not 
work, make sure the USB KB/Mouse Legacy 
Emulation item in HW Setup is set to Enabled.
If problems persist, contact your dealer.