# Controller Error State shutdown (solved, BB controller needs to be replaced) **URL:** \ **Category:** Controller (Buildbotics) Discussion\ **Created:** [August 16, 2023, 9:02pm UTC](https://forum.onefinitycnc.com/t/controller-error-state-shutdown-solved-bb-controller-needs-to-be-replaced/21930 "2023-08-16T21:02:34Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![FrFlaw](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@FrFlaw](https://forum.onefinitycnc.com/u/FrFlaw)\ **Post date:** [August 16, 2023, 9:02pm UTC](https://forum.onefinitycnc.com/t/controller-error-state-shutdown-solved-bb-controller-needs-to-be-replaced/21930/1 "2023-08-16T21:02:34Z")
Does anyone have any idea what happened. After a E-Stop power cycle, the controller wouldn’t power one. I took it apart and blew off the dust with compressed air. both switch and E-Stop worked properly. When turned on after “dusting” the unit powered on but the onscreen E-stop is on and I’m getting all this errors. ![IMG_4980](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/a/c/ac4c0924174c9a2c8641753a27dff1553588dc86.jpeg) ---
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [August 16, 2023, 9:34pm UTC](https://forum.onefinitycnc.com/t/controller-error-state-shutdown-solved-bb-controller-needs-to-be-replaced/21930/2 "2023-08-16T21:34:09Z")
Hey Igor, by the way, if you have wood dust flying around freely in your workshop, I would take precautions [like this](https://forum.onefinitycnc.com/t/pwr-communication-failed-at-reg-0-i2c-read-word-failed-errno-121-remote-i-o-error/18177/17) (and of course [like this](https://www.3m.com/3M/en_US/respiratory-protection-us/)!) Welcome to the forum! ---
**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\ **Post date:** [August 16, 2023, 9:58pm UTC](https://forum.onefinitycnc.com/t/controller-error-state-shutdown-solved-bb-controller-needs-to-be-replaced/21930/3 "2023-08-16T21:58:16Z")
The control board has faulted and will need to be replaced. The only place to purchase one is directly from us at [support@onefinitycnc.com](mailto:support@onefinitycnc.com). ---
**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\ **Post date:** [August 16, 2023, 9:58pm UTC](https://forum.onefinitycnc.com/t/controller-error-state-shutdown-solved-bb-controller-needs-to-be-replaced/21930/4 "2023-08-16T21:58:28Z")