# Electron 2G breathing cyan but apparently not executing code **URL:** \ **Category:** Troubleshooting\ **Created:** [May 22, 2016, 2:33am UTC](https://community.particle.io/t/electron-2g-breathing-cyan-but-apparently-not-executing-code/23071 "2016-05-22T02:33:07Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![bblack7489](https://avatars.discourse-cdn.com/v4/letter/b/e480ec/32.png) [@bblack7489](https://community.particle.io/u/bblack7489)\ **Post date:** [May 26, 2016, 5:34pm UTC](https://community.particle.io/t/electron-2g-breathing-cyan-but-apparently-not-executing-code/23071/14 "2016-05-26T17:34:50Z")
The DFU driver wasn't installed properly. Man, that's a lot of hoops to jump through! Anyway, that's fixed, everything shows up as expected in the Device Manager (driver version 5.2), updated successfully, re-flashed with blinky firmware, and nothing... > C:\Users\bblack\>dfu-util -l > dfu-util 0.8 > Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. > Copyright 2010-2014 Tormod Volden and Stefan Schmidt > This program is Free Software and has ABSOLUTELY NO WARRANTY > Please report bugs to [dfu-util@lists.gnumonks.org](mailto:dfu-util@lists.gnumonks.org) > Found DFU: [2b04:d00a] ver=0200, devnum=11, cfg=1, intf=0, alt=1, name="@DCT Flash /0x00000000/01_016Kg", serial="00000000010C" > Found DFU: [2b04:d00a] ver=0200, devnum=11, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/03_016Ka,01_016Kg,01_064Kg,07\*128Kg", serial="00000000010C" > C:\Users\bblack\>particle update > Your device is ready for a system update. > This process should take about 30 seconds. Here goes! > ! System firmware update successfully completed! > Your device should now restart automatically. > You may need to re-flash your application to the device. > C:\Users\bblack\>particle flash --serial firmware.bin > ! PROTIP: Hold the SETUP button on your device until it blinks blue! > ? Press ENTER when your device is blinking BLUE > sending file: firmware.bin > Flash success! I've tried different USB ports and different cables. However, since it's successfully flashing and updating the firmware, I would would be surprised if it were a port or cable problem, right? What's next? --- _[View the full topic](https://community.particle.io/t/electron-2g-breathing-cyan-but-apparently-not-executing-code/23071)._