# Particle Core's led go blank or breathing white after Update firmware **URL:** \ **Category:** Firmware\ **Created:** [May 20, 2015, 10:14am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946 "2015-05-20T10:14:27Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 20, 2015, 10:14am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/1 "2015-05-20T10:14:27Z")
I have try update with Core firmware (bundled in particle cli) after a unsuccessful flash on [build.particle.io](http://build.particle.io) . My Core can only connect to computer via DFU mode, but the LED’s turn off after exiting DFU mode. Computer cannot detect Core USB . I have tried github spark11 version and deep update .Any clue to solve this issue? Thanks in Advance. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [May 20, 2015, 10:37am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/2 "2015-05-20T10:37:25Z")
Can you try flashing the tinker firmware or performa a factory reset and see if the Core behaves properly? ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 20, 2015, 10:45am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/3 "2015-05-20T10:45:45Z")
I tired. But It is still bricked. ./particle flash --factory tinker // OK Led Back to DFU mode. but ./particle flash --usb tinker // OK Led **_BLANK_** after follwoing ``` Downloading to address = 0x08005000, size = 79996 ............................................................................... File downloaded successfully Transitioning to dfuMANIFEST state Error during download get_status Flashed! ``` ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [May 20, 2015, 12:29pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/4 "2015-05-20T12:29:13Z")
That’s weird if even tinker is not running. I presume it was working all the while? ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 20, 2015, 12:35pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/5 "2015-05-20T12:35:50Z")
It was worked once after unboxing. But it is bricked after a flash on [build.particle.io](http://build.particle.io) build with online example. I try to flash core\_firmware with older version. 11 and 10 LED go OFF. USB is not detect on my MAC. spark\_6 to 9 LED change to White forever. USB is not detect on my MAC. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [May 20, 2015, 12:36pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/6 "2015-05-20T12:36:52Z")
@KennyL, I’m saying to test with `spark flash --usb tinker` to and see what happens when you perform a factory reset. Can you tell me what happens once you do that? ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 20, 2015, 12:44pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/7 "2015-05-20T12:44:25Z")
after flashing ./particle flash --usb tinker , its' LED go OFF . And following is the console output. > checking file /Users/apple/npm-global/lib/node\_modules/particle-cli/binaries/spark\_tinker.bin > spawning dfu-util -d 1d50:607f -a 0 -i 0 -s 0x08005000:leave -D /Users/apple/npm-global/lib/node\_modules/particle-cli/binaries/spark\_tinker.bin > dfu-util 0.7 > Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc. > Copyright 2010-2012 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) > Filter on vendor = 0x1d50 product = 0x607f > Opening DFU capable USB device... ID 1d50:607f > Run-time device DFU version 011a > Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/20_001Ka,108_001Kg" > Claiming USB DFU Interface... > Setting Alternate Setting #0 ... > Determining device status: state = dfuERROR, status = 10 > dfuERROR, clearing status > Determining device status: state = dfuIDLE, status = 0 > dfuIDLE, continuing > DFU mode device DFU version 011a > Device returned transfer size 1024 > No valid DFU suffix signature > Warning: File has no DFU suffix > DfuSe interface name: "Internal Flash " > Downloading to address = 0x08005000, size = 79996 > ............................................................................... > File downloaded successfully > Transitioning to dfuMANIFEST state > Error during download get\_status > Flashed! ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 20, 2015, 12:49pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/8 "2015-05-20T12:49:30Z")
Ok, it works with following combination. spark\_9 core\_firmware + ./particle flash --usb tinker. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [May 20, 2015, 12:54pm UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/9 "2015-05-20T12:54:14Z")
@KennyL, i’m not exactly sure what you are trying to do but there’s shouldn’t be a need to change the spark firmware to get it working unless you are replacing the `spark_tinker.bin` somehow. You can look at the `feature_hal` branch for the latest stable firmware but better to wait for the newest firmware to be release publicly. ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 21, 2015, 3:17am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/10 "2015-05-21T03:17:20Z")
It bricked again. It seem my Core will brick if using [build.particle.io](http://build.particle.io) . If I flash with online with LED example. the Core LED go blank on next reset or power on. And then I can flash the tinker at DFU mode, but the Core LED is still turn blank after exiting DFU mode. I try those with changing USB cable and Port, wait the Core for half hour, still no hope. Do Web IDE or tinker App has some tips on flashing /reflashing? **UPDATE:** I try following , and log the LED state, it is either blank or breathing while at reset. Go DFU Mode > dfu-util -d 1d50:607f -a 1 -s 0x00020000:leave -D ~/Downloads/core-firmware.bin > (latest at github release) > LED blank > Go DFU Mode > ./particle flash --factory tinker > ./particle flash --factory ~/Downloads/core-firmware.bin > ./particle flash --usb tinker > LED blank > Go DFU Mode > ./particle flash --usb cc3000 > ./particle flash --usb tinker > LED blank > Go DFU Mode > dfu-util -d 1d50:607f -a 1 -s 0x00020000:leave -D ~/Downloads/core-firmware.9.bin > LED breath white (spark\_9 firmware) > Go DFU Mode > ./particle flash --usb cc3000 > LED yellow > then I reset > LED become breath white > ./particle flash --usb tinker > LED blank > then I reset > LED become breathing white ---
**Author:** ![KennyL](https://avatars.discourse-cdn.com/v4/letter/k/8c91f0/32.png) [@KennyL](https://community.particle.io/u/KennyL)\ **Post date:** [May 21, 2015, 7:26am UTC](https://community.particle.io/t/particle-cores-led-go-blank-or-breathing-white-after-update-firmware/11946/11 "2015-05-21T07:26:20Z")
I solved that using > ./particle flash --usb cc3000\_1\_14 > instead of > ./particle flash --usb cc3000 > in particles-cli npm