# My umbrel can not boot

**URL:** <https://community.umbrel.com/t/my-umbrel-can-not-boot/9614>\
**Category:** Support and Troubleshooting\
**Created:** [September 27, 2022, 1:11pm UTC](https://community.umbrel.com/t/my-umbrel-can-not-boot/9614 "2022-09-27T13:11:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jacky](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@Jacky](https://community.umbrel.com/u/Jacky)\
**Post date:** [September 27, 2022, 1:11pm UTC](https://community.umbrel.com/t/my-umbrel-can-not-boot/9614/1 "2022-09-27T13:11:54Z")

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My umbrel run pretty well for month. I updated it to v0.5.1 20 days ago and is working well too. But when I reboot it yesterday, it did not work. The light of the network cable is not flashing. I tried several times, but it just can not work. How to fix this?

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**Author:** ![Marcaday](https://avatars.discourse-cdn.com/v4/letter/m/838e76/32.png) [@Marcaday](https://community.umbrel.com/u/Marcaday)\
**Post date:** [September 27, 2022, 2:16pm UTC](https://community.umbrel.com/t/my-umbrel-can-not-boot/9614/2 "2022-09-27T14:16:15Z")

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Hey @Jacky! Sorry that you’ve encountered this issue, are you running Umbrel on a raspberryPi?  
In that case, it’d be nice checking the red & green LEDs of the raspberry to troubleshoot the problem. If the network cable is not flashing I suspect your OS is not booting, if you are using a raspberry it may be due to a faulty mSD card.

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**Author:** ![Jacky](https://avatars.discourse-cdn.com/v4/letter/j/ce73a5/32.png) [@Jacky](https://community.umbrel.com/u/Jacky)\
**Post date:** [September 27, 2022, 10:34pm UTC](https://community.umbrel.com/t/my-umbrel-can-not-boot/9614/3 "2022-09-27T22:34:20Z")

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Yes, it’s the SD card’s problem. I flashed a new SD card. And it’s working now.