Ok, thanks.
I always power down my system before anything concerning CPU handling.

Now, I'll call my Toshiba dealer as soon as possible. i.e. as soon as the the budget is approved. (I have no contract support with this dealer so I have to make sure of everything before any budget approval).

For the record:
- yes my system is on batteries (probably due for maintenance, but still working good).
- I don't see any good surge suppressor.
- My voicemail system is Esnatech 7.1. (BTW, does anyone know a good support forum for Esna system?)

Thanks all, again your help is appreciated.