iMac Internal HDD not seen in disk utility or recovery
I have a 2014 27" iMac that crashed and won't load OS. Get the circle with a slash through it. Went into disk utility but didn't see HDD. I have another drive that I formatted from my MacBook Air with Mac OS Extended (Journaled). Installed and booted to disk utility and recovery. The new drive isn't seen either. I am fairly certain it is the controller on the MB and the machine is toast but just wanted to make sure I chose right format or missed anything else. Image below is with new 1 TB drive installed. Any suggestions are greatly appreciated.