Cannot claim Photon - SOLVED

[ScruffR]

This thread is that old, you better stick with your original one

Problem with photon - blinking blue but can't setup

Have you by any chance altered anything on your WiFi AP? Switch off or rename any 5GHz network. Clear WiFi credentials. Flash Tinker to the device via particle flash --usb tinker (in DFU Mode). Reapply WiFi credentials (wihtout any auto-scanning). Provide a video of what’s happening during boot-up.