I was successfully trying various sample sketches with the Nano BLE Sense without any issues. I uploaded Tensorflow LIte Micro_Speach sketch to the Nano BLE Sense (IDE correctly located the COM path of the Nano). The upload failed and the IDE can now no longer identify the Nano BLE Sense on the COM (greyed out). The USB cables, various ports have all been tested. The IDE can identify other Arduino microprocessors as well as Particle, etc. so it is not the cable, USB, the computer or the IDE. Windows System can identify the Nano BLE properly. No sensors external devices were attached to the Nano. I've tried reloading the board drivers. hitting reset multiple times, etc.
It appears the Nano failed or at least the bootloader. I don't see anyway to reprogram the bootloader.
Any ideas before I throw it away.....? Thank you.