If all the electric power in the property goes off, one of two things has likely happened;
There may be a power cut in your area. To check if this has happened take a look at the street lights, or your neighbour’s lights or ultimately go speak to a neighbour if you are unsure whether it’s just your power.
Or, a fuse may have ‘tripped’. This is likely to be due to a lightbulb or the fuse in a plug blowing. To find out where your fuse box is, check your inventory – it should tell you on the back page. Once you have located it, check all the switches are in the ‘on’ position. If any are in the ‘off’ position you will need to flick this back on. There may also be a main switch that will need to be flicked back into the on position.
If the electrics are off but none of the fuses are flipped ‘off’ then try flicking them all off then on again to see if this solves the issue.