Connecting to Wifi while the board is not connected to my computer

[ProtoXNH]

I got the simplewifi example working when connected to my computer. I disconnected it from my computer, powered the ESP32 with 5 vdc via the 5 v pin. The red light comes alive but it doesn't connect to wifi? can you help me understand what i'm doing wrong?

[chegewara]

Most likely you have problem with stable power source and getting reset because of brownout when wifi is trying to connect.