i'm new at RPi. Today, i installed NOOBS and tried to turn on Wi-Fi. When i clicked network icon (next to the bluetooth icon), it written "no wireless interfaces found".
I typed to terminal "sudo ifconfig". There is no wlan0. I edited wpa_supplicant.conf, it didn't change anything. I tried to change wifi country code on raspi-config but "no wireless interface found","There was an error running option I4 Change Wi-Fi Country" errors showed up. So what should i do?