# Zymkey no longer recognizes Pi

**URL:** <https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260>\
**Category:** ZYMKEY4\
**Created:** [January 23, 2018, 7:13pm UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260 "2018-01-23T19:13:01Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![c3pmark](https://avatars.discourse-cdn.com/v4/letter/c/7ea924/32.png) [@c3pmark](https://community.zymbit.com/u/c3pmark)\
**Post date:** [January 23, 2018, 7:13pm UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260/1 "2018-01-23T19:13:01Z")

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I have a Zymkey 4i connected to a Raspberry Pi model 3B that has been working fine. Yesterday I updated to the new software to resolve the issue described in the “Using Perimeter Detect” thread. Everything worked properly in testing and after several resets. I cut off the ‘lock’ tab and it continued to work fine. However, when I tried it today, the Zymkey no longer syncs up with the Pi - it just shows the same steady fast flash that you get at powerup. Nothing has changed with the hardware or software, and I have 3 other Pi+Zymkeys that work fine (same power, same kb/mouse, etc.). How can I find out what the problem is? Is there a log or something I can look at?

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**Author:** ![Phil\_S\_Zymbit\_1](https://avatars.discourse-cdn.com/v4/letter/p/45deac/32.png) [@Phil\_S\_Zymbit\_1](https://community.zymbit.com/u/Phil_S_Zymbit_1)\
**Post date:** [January 25, 2018, 5:56pm UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260/2 "2018-01-25T17:56:14Z")

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@c3pmark - we created a ticket for this. Someone in the dev team will get back to you in 24.

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**Author:** ![Iker](https://avatars.discourse-cdn.com/v4/letter/i/a6a055/32.png) [@Iker](https://community.zymbit.com/u/Iker)\
**Post date:** [February 15, 2018, 3:05pm UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260/3 "2018-02-15T15:05:16Z")

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I feel the same is happenning to me. What can I do/check?  
System is encrypted, so it doesn’t even boot.

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**Author:** ![Phil\_S\_Zymbit\_1](https://avatars.discourse-cdn.com/v4/letter/p/45deac/32.png) [@Phil\_S\_Zymbit\_1](https://community.zymbit.com/u/Phil_S_Zymbit_1)\
**Post date:** [March 2, 2018, 2:58pm UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260/4 "2018-03-02T14:58:56Z")

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@c3pmark  
just checking to see if you were able to resolve your problem ?

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**Author:** ![Iker](https://avatars.discourse-cdn.com/v4/letter/i/a6a055/32.png) [@Iker](https://community.zymbit.com/u/Iker)\
**Post date:** [March 5, 2018, 9:29am UTC](https://community.zymbit.com/t/zymkey-no-longer-recognizes-pi/260/5 "2018-03-05T09:29:08Z")

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Yes, in my case it was due to a power supply problem.