You can do this by entering to the BIOS.
On the Power Section you have 4 Items.
Put on "Disable" the last 2 of them(High Performance Mode and Long Battery life Mode).
When your power button is blinking is beacuse of 2 posible reasons:
1. You have connected your beautiful sentia laptop to the AC power and you have Enabled the High Performace Mode in the Power Section at the BIOS.
2. Your pretty amaizing laptop is working whit batttery power and you have Enabled the Long Battery life Mode in the Power Section at the BIOS.
By default both of them (High Performance Mode and Long Battery life Mode) are set to "Enable" .
Enjoy your new sentia. Its amaizing .. isnt it?