server won't boot

Hi all ,
i was trying to upgrade firmware on machine 7028-6E4 and it failed .
Now machine does not boot anymore , i can not get SMC menu either ...
What are my options ?

Thanks,
Rahim

hi,
are you able to give me more of details?
what is the ancient version of the firmware and the news with which you have make the update?

MAZOUARI/morroco