F5 is not providing any console/Web Access.Software is corrupted. How to clean install its firmware?

I’ve encountered the same issue and followed the steps outlined above, which resolved it. Since you don’t have console access, that’s the only viable option. If the device doesn’t respond to console, USB, or LCD input, it’s highly likely a hardware failure. 

I would recommend you going through the following article:

K13164: Creating a bootable USB thumb drive

https://my.f5.com/manage/s/article/K13164