Electron bricked - solid D7 led

Troubleshooting
1

Hi everyone,
my Electron stopped working this morning and now only D7 led is on when I turn it on with its LiPo battery. When I plug it with the USB cable, the usb led also turns on.
I can’t understand why It stopped since I’ve been using this configuration for months. I read about it may be due to flaky power supply or bad contact though and that’s probably my case since some sensors’ leds flickered a bit.

I can’t get into DFU mode anymore and I also tried holding SETUP + pushing reset one time, as I read in another thread.

I also tried SWD using a Photon as programmer. I run it 10/15min ago but it didn’t prompt anything except for:
Do you have a dead device and wish to continue? [y,N]:y
Photon’s led is solid yellow/red while their D7 led are brighter now. Can I stop them?

I went to this topic (Dim d7 blue light and jtag config help for recovery) but links there are dead. @ScruffR

Can I use other photon as JTAG programmer? If not I have also a MCS-73 TTL USART and a chinese board I used as TTL/UART but with many more pins available (In the picture. HD: https://ibb.co/cQYzywL)

IMG_20190514_155510
IMG_20190514_1555102176×4608 2.88 MB

Can somebody help me? Tnks :slight_smile:

2

There might be an issue with how you power the Electron
See here
https://docs.particle.io/datasheets/cellular/electron-datasheet/#3v3-pin

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If if that was possible, the power demand of the Electron would max out the power the Photon could provide via the 3v3 pin and potentially damage the Photon’s regulator

https://docs.particle.io/datasheets/wi-fi/photon-datasheet/#pin-description

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3

Damn, I moved the jumper from Electron’s 3V3 to its VIN. (Opposite side).
I relaunched SWD but I don’t see any difference from before. Just blue leds are not so bright now.
Too late?

4

Possible :flushed:

What does the Photon do now when you take it out?
What does the Electron do when you plug in the LiPo (and nothing else)?

5

Photo starts with blue (MAIN) led on.
Electron only turns on D7 led as before.

Nothing has changed. I think my first topic is still valid then :sweat_smile:

6

You can file a support ticket at support.particle.io