# Photon: dfu-util - No DFU Device found **URL:** \ **Category:** Troubleshooting\ **Created:** [December 9, 2015, 7:20am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131 "2015-12-09T07:20:49Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![rahul](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rahul](https://community.particle.io/u/rahul)\ **Post date:** [December 9, 2015, 7:20am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/1 "2015-12-09T07:20:49Z")
Hiii, First timer here... So please excuse me if I haven't been able to explain my problem clearly. I'm trying to flash my Photon locally, but the dfu-util is not able to detect the photon in DFU mode no matter what. I've tried two machines (Macbook Pro as well as Windows 8.1 laptop), every USB port available on both the machines and 6 different USB cables. The Photon is flashing yellow which indicates that the Photon did enter DFU mode. On Windows machine I keep getting error USB Device not recognised. On the Mac, while the Photon is in DFU Mode, the dfu-util -l command gives the following output > Found Runtime: [05ac:8286] ver=0151, devnum=7, cfg=1, intf=3, alt=0, name="UNKNOWN", serial="UNKNOWN" But as soon as I run any command on Particle CLI to flash the Photon, I get the following > !!! I was unable to detect any devices in DFU mode... > Your device will blink yellow when in DFU mode. > If your device is not blinking yellow, please: > 1. Press and hold both the RESET/RST and MODE/SETUP buttons simultaneously. > 2. Release only the RESET/RST button while continuing to hold the MODE/SETUP button. > 3. Release the MODE/SETUP button once the device begins to blink yellow. > Error writing firmware...No DFU device found Further in listening mode (i.e flashing blue), when I run the command particle serial list, it gives > No devices available via serial Any ideas what might be wrong ???? Did I finally manage to break my Photon??? 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:** [December 9, 2015, 8:15am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/2 "2015-12-09T08:15:39Z")
Did you try both USB port on the Macbook? ---
**Author:** ![rahul](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rahul](https://community.particle.io/u/rahul)\ **Post date:** [December 9, 2015, 8:35am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/3 "2015-12-09T08:35:02Z")
Thanks for the quick reply. Yes I did try both the ports… On the Windows machine I had 4 USB ports and I tried on all of them as well… ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [December 9, 2015, 8:45am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/4 "2015-12-09T08:45:45Z")
Weird. Can you place the Photon in Listening mode (blinking blue) and test `particle serial identify`? ---
**Author:** ![Moors7](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/moors7/32/588_2.png) [@Moors7](https://community.particle.io/u/Moors7)\ **Post date:** [December 9, 2015, 11:45am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/5 "2015-12-09T11:45:59Z")
Did you install the relevant drivers? ---
**Author:** ![rahul](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rahul](https://community.particle.io/u/rahul)\ **Post date:** [December 9, 2015, 10:07pm UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/6 "2015-12-09T22:07:05Z")
Hi @kennethlimcp, particle serial identify gives... > ! serial: No devices available via serial Hi @Moors7, Yes the relevant drivers have been installed.. I have two Photons and the other one works just fine... ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [December 10, 2015, 2:03am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/7 "2015-12-10T02:03:34Z")
So my take is maybe the photon has some issues… Do you have the USB cable from Particle? ---
**Author:** ![rahul](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rahul](https://community.particle.io/u/rahul)\ **Post date:** [December 10, 2015, 2:50am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/8 "2015-12-10T02:50:43Z")
I don’t, I didn’t but the kit … Just bought the board… ---
**Author:** ![appocalypse](https://avatars.discourse-cdn.com/v4/letter/a/df705f/32.png) [@appocalypse](https://community.particle.io/u/appocalypse)\ **Post date:** [January 1, 2017, 11:02am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/9 "2017-01-01T11:02:18Z")
Hi! Dont know if you need help anymore… but have you already installed the usb-driver via zadig\_2.2.exe ? Greetings Alex ---
**Author:** ![Ed\_SanDiego](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ed\_SanDiego](https://community.particle.io/u/Ed_SanDiego)\ **Post date:** [August 1, 2017, 4:33am UTC](https://community.particle.io/t/photon-dfu-util-no-dfu-device-found/18131/10 "2017-08-01T04:33:20Z")
Did this issue get solved? I have the same issue. MacBook, tried both USB ports, device blinking yellow, etc. I’m going this because of “network errors when attempting to connect to cloud” either when using Tinker or command line utilities.