# \[SOLVED\] Anyone ever seen this behavior? **URL:** \ **Category:** Troubleshooting\ **Created:** [January 5, 2017, 12:41am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359 "2017-01-05T00:41:46Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![james211](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/james211/32/20744_2.png) [@james211](https://community.particle.io/u/james211)\ **Post date:** [January 5, 2017, 12:41am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/1 "2017-01-05T00:41:46Z")
**Mod edit (@harrisonhjones): Solution: Used `particle keys server` to resolve the issue** I set this photon up today, it worked fine until I unplugged it and replugged it in. Now its blinking cyan very fast, with intermitten red blinks. I’ve not seen this before. It will go back into setup mode, but when it gets to point of verifing device ownership it fails. ---
**Author:** ![harrisonhjones](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/harrisonhjones/32/4132_2.png) [@harrisonhjones](https://community.particle.io/u/harrisonhjones)\ **Post date:** [January 5, 2017, 1:05am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/2 "2017-01-05T01:05:40Z")
Please see [SOLVED -- Cannot connect Photon - blinking cyan with red flashes](https://community.particle.io/t/solved-cannot-connect-photon-blinking-cyan-with-red-flashes/19384) ---
**Author:** ![james211](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/james211/32/20744_2.png) [@james211](https://community.particle.io/u/james211)\ **Post date:** [January 5, 2017, 3:06am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/3 "2017-01-05T03:06:12Z")
So I gave that a shot, put the photon in DFU, ran `particle keys doctor 56002b000b5135333532xxxxx` then I get “Error - No DFU device found” Now if I put the device into discovery mode, and type `particle serial list` I get the device ID and firmware version. I’m not sure why it doesn’t see it in DFU mode. ---
**Author:** ![harrisonhjones](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/harrisonhjones/32/4132_2.png) [@harrisonhjones](https://community.particle.io/u/harrisonhjones)\ **Post date:** [January 5, 2017, 3:36am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/4 "2017-01-05T03:36:19Z")
Usually if it can’t find the DFU device it’s because you don’t have the drivers installed. What OS are you using? If windows, what does your device manager window look like? ---
**Author:** ![james211](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/james211/32/20744_2.png) [@james211](https://community.particle.io/u/james211)\ **Post date:** [January 5, 2017, 3:38am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/5 "2017-01-05T03:38:46Z")
I’m on Mac running El Cap Running node.js version 4.6 particle-cli@1.18.0 \*\*Update - switched cables and was able to run keys doctor, but I’m still getting the flashing cyan/red lights. ---
**Author:** ![ScruffR](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/scruffr/32/6952_2.png) [@ScruffR](https://community.particle.io/u/ScruffR)\ **Post date:** [January 5, 2017, 7:20am UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/6 "2017-01-05T07:20:18Z")
Have you also executed ```nohighlight particle keys server ``` ---
**Author:** ![james211](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/james211/32/20744_2.png) [@james211](https://community.particle.io/u/james211)\ **Post date:** [January 5, 2017, 12:01pm UTC](https://community.particle.io/t/solved-anyone-ever-seen-this-behavior/28359/7 "2017-01-05T12:01:45Z")
That worked! Thank you @ScruffR