@ladysarakat, can you do this:
npm update -g particle-cli- place Photon in DFU-mode
particle update- place Photon in DFU-mode
particle flash --usb tinker- hold on to the SETUP button until the device blinks blue
- release SETUP button and press and hold until it blinks blue rapidly to clear wifi credentials
-
particle serial wifito setup Wifi credentials
Let me know how it goes. Sorry about that! We can arrange for RMA if it really doesn’t work 