Toshiba satellite a20 series 用户手册

Appendix H EC/KBC Rewrite Procedures

Appendices

Appendix H

Appendix H EC/KBC Rewrite Procedures

This Appendix explains how to rewrite the EC/KBC system program when you update the
EC/KBC system.
Tools

To rewrite the EC/KBC, you need the following tool:

BIOS/EC/KBC rewriting disk for the computer

Rewriting the EC/KBC

NOTE: 1. Rewrite the EC/KBS only when instructed by a diagnostic disk release

notice.

2. Connect the AC adaptor to the computer when you rewrite the EC/KBC.

3. Do not turn off the power while you are rewriting the EC/KBC.

If the rewrite fails, it might be impossible to start up the computer.

4. If you fail to rewrite EC/KBC, then when you next turn on the power, a

message may be displayed that the contents of the EC/KBC has been erased.
In this case, insert the BIOS/EC/KBC rewriting disk, and the EC/KBC will
be rewritten.

5. Normally it takes about 30 seconds to rewrite the EC/KBC. It may take 3

minutes (maximum), depending on the conditions of the computer or ICs.
The computer is not hung up. Allow sufficient time. Never reboot or turn
off the power to the computer before the rewriting is completed.

1.  Set the system to boot mode.
2.  Turn off the power to the computer.
3.  Remove the external cable and PC Card.
4.  Insert the BIOS/EC/KBC rewriting disk into the built-in FDD.
5.  Turn on the power while holding down the

Tab

key. (Keep holding down the key

until a message appears on the screen.) The BIOS/EC/KBC rewriting starts.

6. When the EC/KBC rewrite is completed, the system is automatically turned off.

Satellite A20 Maintenance Manual (960-444)

H-1