Toshiba Satellite M40 Maintenance Manual page 283

Appendices
Note: 1. Rewrite the EC/KBS only when instructed by a diagnostic disk release1
notice.
2. Connect the 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 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.
H-2
Apx. H EC/KBC Rewrite Procedures
TE2100 Manual Manual