Antminer Z9 mini overclocked

[efudd]

Guys,
I updated to the new antminer z9 mini firmware from Bitmain's site. Now I am stuck with Antminer-Z9-Mini-fixed-500M-201905171644.tar.gz.
If I try any file it says the file is not signed. I cannot even SSH to the miner like before.
Any help?

Yes... all bitmain. New images are like this.... if you want to get off their stuff cause my AD card boot image and install whatever nonlocked firmware you want as the last step.

http://Https://releases.broked.net

[SilverDesert]

Thank you for your kind help 

[antminerguruguy]

Thank you for your kind help 

Can anyone help me reset my firmware for my z9 mini I reinstalled the new firmware now it just says balance and stuck at freq 500m forever it use to say " BrentSecond " for firmware and allowed me to change the frequenzy but I was having pool issues to I thought I would reset it now its File System Version   Fri May 17 16:23:07 CST 2019   it use to be 2018 file system there I think now I cant do anything can anyone help me or is this some kind of joke the chinese enjoy torturing us with annoying control efforts?