File system not found – 3040

We bought some used Wyse 3040’s off ebay, and I am trying to configure them.  The very first one, and I suspect the rest, will not boot.  It also needed a  new battery, which I replaced.  But after doing that I found there is no boot device being detected.  In the BIOS I cannot see the “disk” anywhere.  But when I ran diagnostics the little test that ran gave the impression that there was a drive in there somewhere.

I haven’t been able to figure out how to reconfigure it to boot (yet).  I am going to try the usb image tool … but I have never used this before, or had a Wyse that didn’t boot in this way.  It is definitely a head scratcher for me.

my question is two fold – were some 3040’s sold as diskless?  shouldn’t this have some onboard “disk” to have an OS run from?

Assuming there is a disk and the device has just been configured to boot over the network .. how do I get it back?

Thank you