I had some issues with my WiFi card (8265) as it suddenly it stopped being detected. I tried the workaround described in Wifi M.2 Intel 3168NGW loading but can not use it.
However I must have done something wrong with the extlinux.conf file as now the Jetson nano does not boot. The green light turns on but nothing else, no message at all and no screen display.
Do you know how can I solve it or at least how can I recover the files and info stored in the SD card?