# Core flashes cyan then blinks orange

**URL:** <https://community.particle.io/t/core-flashes-cyan-then-blinks-orange/44025>\
**Category:** General\
**Created:** [September 16, 2018, 8:30pm UTC](https://community.particle.io/t/core-flashes-cyan-then-blinks-orange/44025 "2018-09-16T20:30:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cush](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/cush/32/18175_2.png) [@cush](https://community.particle.io/u/cush)\
**Post date:** [September 16, 2018, 8:30pm UTC](https://community.particle.io/t/core-flashes-cyan-then-blinks-orange/44025/1 "2018-09-16T20:30:17Z")

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Hello, a few weeks ago without any known environment change or developer action (flashing firmware) my core started fast flashing cyan then blinking orange 3 times.

I have factory reset the core, successfully run setup from the cli, connected it to wifi and signaled it from the cloud console, but as soon as the tinker app is flashed to it, it resumes fast flashing cyan and orange blinking.

Running `particle keys server` and `particle keys doctor <the uuid>` at this point also succeeds but when the device restarts it resumes the same behavior.

I have also attempted to reflash the factory firmware  
particle flash --factory tinker #apparently fails with message "413 Request Entity Too Large"  
particle flash --usb cc3000 #succeeds  
particle flash --usb tinker #succeeds

The steps from other posts did not resolve the issue:

> [@(re-open) fast blinking cyan mixed with 3 orange blinks](https://community.particle.io/t/re-open-fast-blinking-cyan-mixed-with-3-orange-blinks/30879):
>
> I’m having the exact same problem as described in this post (which was closed a while ago): https://community.particle.io/t/photon-flashing-cyan-and-blinking-orange/21530/26 Sorry to re-open this, but, well, I’ve made two Photons unusable now, and the apparent solution there hasn’t worked for me. The solution in the above thread was to use the command particle keys server but when I do I get this error message: Please specify a server key in DER format. (BTW, I’m on WIndows 7.) So …

and

> [@Photon setup flashing cyan with a "quick red burst" (now orange burst) \[Solved\]](https://community.particle.io/t/photon-setup-flashing-cyan-with-a-quick-red-burst-now-orange-burst-solved/12118):
>
> most of my photons have gotten setup without a problem (go team!) but one is having a weird setup issue. the iphone app wont set it up (same problem as shown in the video) and doing this via serial has the same results. once i provide the wifi credentials, it flashes green, then cyan rapidly, with a very weird super quick burst of red/orange light. here is a video…

Any ideas?

Thanks

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<div class="post-metadata">

**Author:** ![peekay123](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/peekay123/32/810_2.png) [@peekay123](https://community.particle.io/u/peekay123)\
**Post date:** [September 16, 2018, 9:56pm UTC](https://community.particle.io/t/core-flashes-cyan-then-blinks-orange/44025/2 "2018-09-16T21:56:05Z")

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@cush, it seems the solution you tried works but some but not for others. It didn’t work for me either. I’m still poking the Particle folks to see what they can do.