You can always, be sure you use properly the USB cable and it's recognized by your computer. Try again only with such log we can help you.

We mean connecting with USB Cable from PC to back Service port of box (Putty to COM port in 115200 bps), not Putty via RJ45/Network IP.

When you connect the box/cable your computer will recognize the port and you can find in the settings the correct COM port to set on Putty. When you have it you connect the cable setting the COM properly at speed 115200 bps with Putty and will see on the Putty console all details of boot and failures. Copy all text to file and post here.

TS