Xperia3 dual sim, flashed miui rom from z1 on accident

Now pc wont recognize phone in fastboot or flashmode. It had a 48% charge and it did start up into a bootloop 3 or 4 times. thats why i thought i would be ok. Then I realized it was a rom for z1 and it quit startin g at all. it is recognized as something by pc, although it says device not recognized. no lights no nothing.