If you can SSH into the box, please collect the dmesg output, and post it here with preformatted text. That will greatly increase our knowledge of what your box’s problem is. If the box is having difficulty reading its internal HDD (bad sectors, et al)-- that failure will be recorded in the dmesg system log.
Sadly, I do not know if you can get an SSH shell up and running without first configuring the dashboard. We might be able to FORCE the sshd to run using the USB startup script trick.
We can manually invoke the sshd and force it to run (even manually configure it if needed), using this startup script methodology, and then be able to get in, and collect the dmesg output. Failing that, we can use the script itself to collect the dmesg output by passing its output to a file on the usb stick, then reading the stick in a computer.
Please collect dmesg output, and post it here. 
