If no LEDs at all are on, there is most likely a power or a switch problem. I would expect at least the PWR light to be on and green. The SYST light is general on with that model, too. It is usually amber during boot, then it blinks green, then goes solid green. Typically the STAT light is green as well. Otherwise to troubleshoot further you need a USB-A to USB-C or a DB9 to RJ45 and a rollover cable along with a serial port or a USB to serial port.
If you get the USB cable, the device itself emulates a serial port by Silicon Labs.
You can get the COM port number in device manager if on a Windows box. There are a LOT of tutorials for connecting to these after you have the right cable