How to fix firmware ugrage encountered an issue on my samsung S3 mini GT-i8190

Hi guys, can someone help me fix my GT-i8190 ?. I was updating my firmware earlier but then accidentally my PC shuts down, then my phone is saying "Firmware encountered an issue please select recovery mode in Kies" . But when i connect my USB chord to my PC, it doesn’t detect my phone.. can some help me.. Thnks