# V1.4 update failed, stuck on cypress bootloader

**URL:** <https://discourse.myriadrf.org/t/v1-4-update-failed-stuck-on-cypress-bootloader/713>\
**Category:** LimeSDR\
**Created:** [9 February 2017 12:30 UTC](https://discourse.myriadrf.org/t/v1-4-update-failed-stuck-on-cypress-bootloader/713 "2017-02-09T12:30:43Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [10 February 2017 08:57 UTC](https://discourse.myriadrf.org/t/v1-4-update-failed-stuck-on-cypress-bootloader/713/11 "2017-02-10T08:57:04Z")

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Note please, that external power supply voltage must be minimum 6V (max 12V). So, if you used USB power brick I would expect it to be 5V which is not going to work.

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_[View the full topic](https://discourse.myriadrf.org/t/v1-4-update-failed-stuck-on-cypress-bootloader/713)._