# Buildbotics controller not powering up

**URL:** <https://forum.onefinitycnc.com/t/buildbotics-controller-not-powering-up/28343>\
**Category:** Original/PRO Series (Buildbotics) (Gen 1)\
**Created:** [August 23, 2024, 4:43pm UTC](https://forum.onefinitycnc.com/t/buildbotics-controller-not-powering-up/28343 "2024-08-23T16:43:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [August 23, 2024, 5:24pm UTC](https://forum.onefinitycnc.com/t/buildbotics-controller-not-powering-up/28343/2 "2024-08-23T17:24:58Z")

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Hey ksw,

you could try to see with a multimeter if the Meanwell power supply has its AC input power. If so, you could check if the power supply delivers 36 V DC power.

If it has, you could short J18 on the AVR mainboard, the controller should boot then. If so, the pushbutton is broken.

- [Location of fuse](https://forum.onefinitycnc.com/t/location-of-the-inline-fuse-in-the-bb-controller-non-elite/7096)
- [Check J18](https://forum.onefinitycnc.com/t/just-bit-the-bullet-question-on-controller-power/18756/2)
- [Support // Servicing A Faulty Power Switch](https://forum.onefinitycnc.com/t/support-servicing-a-faulty-power-switch/8586)

> [@Screen frozen cant click on anything](https://forum.onefinitycnc.com/t/screen-frozen-cant-click-on-anything/27248/9):
>
> wood dust on the pcb or overheating can make this. The solution would be sufficient dust extraction, enclosing the controller in an [enclosure with a big fan and a HEPA filter](https://forum.onefinitycnc.com/t/pwr-communication-failed-at-reg-0-i2c-read-word-failed-errno-121-remote-i-o-error/18177/17), and replacing the noisy small fan by a 120 mm fan in the top of the case. If the system freezes it is certainly the smaller upper pcb which is the Raspberry Pi. I don’t think it is much ventilated should the environment be hot.
> 
> Should wood dust be the cause, I would use a [ESD-safe](https://en.wikipedia.org/wiki/Electrostatic-sensitive_device) brush to try to clean the pcb. Or you remove the pcbs and use [CRC KONTAKT LS](https://www.kontaktchemie.com/KOC/KOCproductdetail.csp?product=KONTAKT%20LS) to clean them.
> 
> ([CRC Kontakt promo video](https://www.reichelt.de/leiterplattenspuelung-kontakt-ls-500-ml-kontakt-30169-p109992.html?ACTION=413&VIEW=noframe&INLINE=true&ID=%2Fweb%2Fartikel_ws%2FD800%2FCRCFINALKONTAKT.mp4))
> 
> Also if you had a problem with the SD card, I would not overwrite the old one but buy one of good quality (Sandisk brand).

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