Boron: Cannot enter DFU; solid white

Troubleshooting
1

Greetings all,

I am having a problem with my Boron: I have a solid white LED and cannot enter DFU mode. I have researched all of the White LED threads and nothing is working. This is a Boron on .9 build.

Background; I had a failure in burning my Boron OTA, resulting in a solid white LED. Boot sequence; flashing green to flashing blue to solid white. I cannot enter DFU mode at all - no response from my mode/reset buttons. I cannot flash via USB (cannot go into DFU mode).

May I get a suggestion, please?

2

well if you’re running windows look in device manager and check if it was showing up under com ports by chance and if it is then open a terminal and try this
MODE COMx 14400
x being the port number
if you’re lucky that should put the device in dfu mode.

3

Can you enter Listening Mode?
If so post the output of particle serial inspect
If you can’t you may need to reflash the SoftDevice and bootloader via JTAG/SWD.