BMC does not respond

hello I have a PowerEdge C2100

The problem is server was working and I tried to update BMC firmware from 1.66 to 1.86 the update was not successful but everything was OK until 2 Hours later and after that the BMC couldn't work and even server couldn't shout down even by holding the power button and I disconnected the AC powers.

after re-inserting AC powers, all the lights were blue like x-mass lights and after many trying, the server got power on but the BMC did not work and I got the error 8601 which says the BMC is not defined..

even in bios setting the BMC version firmware is 00 00.00 and the mac address does not exist.

I tried to re-install the BMC update but I did not solve the problem.

how can I re-install the frimware again

is there any solution at all?

please help if you can cause it is an emergency.