[SOLVED] PSU no voltage switch?

[ibn5000]

hi, my friend recently got hes father's pc, it's like 6y/o or something it has and i5 650, 8gb ram, gt 210, and an 750watt powersupply.

before moving it to my friend's room we tried to boot it up and everything was working fine
but when we moved it to his room and we boot it the eletricity of the appartment went off

we checked the psu and it has no voltage switch
so why when we boot it before was working and now not? any suggestions?

this is the psu:

 

[CountMike]

Most PSUs nowadays can work from 110 - 250v but some were made for one voltage only. Is it possible that power in his room is 220v and in yours 110v ? Some countries have dual voltages. Where was that ?

 

[ibn5000]

uhm i don't think so it's an very old psu like 6-7 y/o , we are from italy and we use 230v, but on the back of the psu there isnt any switch for that

 

[CountMike]

Open the side of the case, there should be a sticker on the PSU stating input and output voltages.

 

[ibn5000]

sorry answering so late this is his psu:

 

[CountMike]

It's clearly 100 - 240v auto adjustable input voltage. Doesn't need voltage switch. So, if it blows/trips fuses, something must be shorted inside.