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:
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. Be sure to connect both battery and AC adapter 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 content of the EC/KBC has been erased.
In this case, insert the EC/KBC rewriting disk, and the EC/KBC will be
rewritten.
5. The time of rewriting EC/KBC depends 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. Connect a USB FDD and insert the EC/KBC rewriting disk into the USB FDD.
5. Turn on the power while holding down the Tab key. The EC/KBC rewriting starts.
6. When the EC/KBC rewrite is completed, the system is automatically turned off.
PORTEGE M300 Maintenance Manual (960-504) H-1