Appendix G Ec/Kbc Rewrite Procedures - Toshiba Satellite U500 Maintenance Manual

Appendix G EC/KBC rewrite procedures

Appendix H
Appendix G 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:
Bootable USB key for the computer that has renewed BIOS data.
Rewriting the EC/KBC
NOTE: 1. Rewrite the EC/KBC 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
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 have 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, connect the USB key which has the latest BIOS
document to t he system.
4. Turn on the power with Esc key pressing down, and choose boot from USB device.
5. Enter to the BIOS document and execute the "UBIOS.bat".
6. The BIOS rewriting starts.
7. When the process is completed, the system automatically shutdown.
Satellite U500/PORTEGE M900D/Dynabook Maintenance Manual [CONFIDENTIAL]
turn off the power while you are rewriting
Appendices
the EC/KBC.
G-1