hi.for the past five hours i'm trying to boot my new pc but nothing is happening.i checked all the tips one the list here it tom's harware about this problem but nothing worked.i changed multiple times the ram's,i changed the cpu's position,i unsrewed the motheboard and nothing.i'm going innsane here.i don't even hear the beep whaen i activeta the pc/everything else is working,the fans.the hard drive,the gpu,everything has power.please help me