Does LED light up when plugged in?
Use a "Full Test" script (if available) to see if the software can at least see the serial number. If the SN shows as 00000 or Unknown , the firmware on the internal ARM chip may be corrupted. 6. Inspecting the PCB (For Advanced Users) iprog programmer not connected hot
Always plug the device directly into the motherboard’s USB port (the back ports on a desktop). Does LED light up when plugged in