Hello @Infz and welcome how did the friend switch off? due to a short circuit or by switching off the house fuse? use a measuring device or consumer to check whether there is electricity at the socket to the pc. did you connect an overvoltage protection upstream and it triggered? if there is power, try a residual current discharge and if that doesn't work, briefly remove the cmos battery bye Fishtown https://community.medion.com/t5/kb/en/ta-p/92923
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