Thanks. Ya, sometime forget. My stupid colleague spoil a RM16k special pc by just plug into the 240v. I don't no how he do that.

Actually not that easy to mistake. The plug for 110v and 240v is different shape. So you can't straight away plug into the 240v socket without convert it.

I have this habit that see the plug first before plug in to it. If the shape different, I will read the label.