Toshiba NB255 User Manual

NB250/NB255  Series Maintenance Manual   

                                                                       

3

 

Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the computer is 
causing the computer to malfunction.  The FRUs covered are:

 

1. Display 

7. Wireless LAN 

13. External ODD 

2. HDD/SSD 

8. Camera 

14. Bridge media 

3. Keyboard 

9. Bluetooth(10BL no support) 

15. 3D sensor(10BL no support) 

4. USB ports 

10. Headphone 

16. Sleep charge(10BL no support)

5. Touchpad 

11.MIC  

 

6. Speaker 

12. 3G module(10BL no support)   

 

 

The Diagnostics Disk operations are described in Chapter 3.  Detailed replacement 
procedures are given in Chapter 4. 

The following tools are necessary for implementing the troubleshooting procedures: 

1.  Phillips screwdriver (2 mm) 

2.  6mm nut driver (for the helix screw nuts on the rear ports for RAM door) 

3.  2DD or 2HD formatted work disk for floppy disk drive testing 

4.  Torx screw driver with type T6 bit for HDD door  

5.  USB memory disk 

6.  Multimeter 

7.  External monitor\ODD 

8.  USB compatible keyboard 

9.  Multimedia sound system with line-in and line-out ports 

10. Headphones 

11. USB test module and USB cable 

12. MIC line 

If you know the location of the malfunction, turn directly to the appropriate section of this 
chapter. If the problem is unspecified, use the flowchart in Figure 2-1 as a guide for 
determining which troubleshooting procedures to execute.  Before performing any 
troubleshooting procedures, verify the following: 

  Ask the user if a password is registered, if it is, ask him or her to enter the password. 

  Verify with the customer that Toshiba Windows XP/Vista/Linux is installed on the hard 

disk. Operating systems that were not preinstalled by Toshiba can cause the computer to 
malfunction.