# Core keeps blinking white
**URL:** https://community.particle.io/t/core-keeps-blinking-white/5655
**Category:** Troubleshooting
**Created:** [July 10, 2014, 7:00pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655 "2014-07-10T19:00:51Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@krvarma](https://community.particle.io/u/krvarma)
#### Post date: [July 10, 2014, 7:00pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/1 "2014-07-10T19:00:51Z")
One of my core was not used for 2-4 weeks and I tried it today, but the core keep on blinking white. I am not able to reset the core also. Even if I reset it is not blinking blue, but keep on blinking white. I have attached a video of the issue, can someone help me to bring it back to normal?
([https://www.dropbox.com/s/w7yduiikno570i9/core2.mp4](https://www.dropbox.com/s/w7yduiikno570i9/core2.mp4))
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### Author:  [@Dave](https://community.particle.io/u/Dave)
#### Post date: [July 10, 2014, 7:29pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/2 "2014-07-10T19:29:31Z")
Hi @krvarma,
We’ve seen some white blinking cores come back to normal after warming up for a few minutes. If you haven’t already, any chance you could leave it plugged in for 5-15 minutes and see if that helps? Otherwise can you try a factory reset if you haven’t already?
We’ve also seen pulsing white cores happen as a result of underpowering / bad usb cables, can you try a different cable / power supply?
Thanks,
David
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### Author:  [@krvarma](https://community.particle.io/u/krvarma)
#### Post date: [July 10, 2014, 8:45pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/3 "2014-07-10T20:45:25Z")
@Dave, I tried factory reset and kept for almost 1 hour, but no luck ☹. I connect to my laptop and desktop also but same result.
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### Author:  [@Elijah](https://community.particle.io/u/Elijah)
#### Post date: [July 10, 2014, 9:02pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/4 "2014-07-10T21:02:34Z")
Good luck @krvarma I would try using a different USB cable, or powering from a non-USB source to try to narrow down the issue. Also make sure nothing about your LAN configuration has changed recently.
It might be informative if you posted a video of what happens when you plug it in.
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### Author:  [@krvarma](https://community.particle.io/u/krvarma)
#### Post date: [July 10, 2014, 9:09pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/5 "2014-07-10T21:09:10Z")
@Elijah, I already tried different cable and power source but same result. I posted the video link in my original post. This is what is happening when I power the :spark:, Non-USB as well as USB ☹
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### Author:  [@Dave](https://community.particle.io/u/Dave)
#### Post date: [July 10, 2014, 9:24pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/6 "2014-07-10T21:24:56Z")
Hi @krvarma,
We’re still trying to narrow down all the scenarios where the core is stuck flashing white like this. Can you email us at [hello@spark.io](mailto:hello@spark.io), and we can arrange a replacement?
Thanks,
David
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### Author:  [@kennethlimcp](https://community.particle.io/u/kennethlimcp)
#### Post date: [July 10, 2014, 10:35pm UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/7 "2014-07-10T22:35:12Z")
@krvarma,
1. were you able to factory reset?
2. Are you able to send wifi credentials to the core? (Blinking blue)?
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### Author:  [@krvarma](https://community.particle.io/u/krvarma)
#### Post date: [July 11, 2014, 7:15am UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/8 "2014-07-11T07:15:18Z")
@kennethlimcp, I am not able to factory reset, when ever I try it starts blink yellow and white but never the blinking blue.
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### Author:  [@kennethlimcp](https://community.particle.io/u/kennethlimcp)
#### Post date: [July 11, 2014, 8:28am UTC](https://community.particle.io/t/core-keeps-blinking-white/5655/9 "2014-07-11T08:28:46Z")
@krvarma,
Can you add me on skype or google chat? We will troubleshoot offline ;D