Hi guys 2 of my photons won’t start up, they just show a dim blue light on pin D7. Researching on the web it appears to be that the photon is corrupted/fried, and this might be the case for one of them, because it was power up with a 9V battery before reading that the maximum input should be 5V. T…

[image] dsn101: Once in DFU mode, I can’t put it on “listening mode” That's not what @Mjones suggested, he meant you should then (in DFU Mode) run the CLI command particle update I'd go further an do this particle flash --usb tinker -v particle update -v particle flash --usb tinker -v (all…

Dry DFU mode and Particle update

Hi @ScruffR , once again thank you for being so helpful, the instructions that you give worked. I never had to use DFU mode or knew how to use it. One of the 2 photons was repair(the one which I manage to put on DFU mode) the other one, I can’t take te blue dim light on D7. Or see any spark on the s…

You can try this approach for your other device [image] m-mcgowan/embedded-swd Serial Wire Debug (SWD) implementation for Particle devices - m-mcgowan/embedded-swd

Photon D7 dim light

Troubleshooting

dsn101 December 9, 2019, 5:57am 3

Hi
Once in DFU mode, I can’t put it on “listening mode”, it just stay blinking yellow.

Can't update Photon

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Photon D7 dim light

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