# SLB E-stop not working

**URL:** https://forum.sienci.com/t/slb-e-stop-not-working/12030
**Category:** 🔌Board
**Created:** [April 22, 2024, 1:37am UTC](https://forum.sienci.com/t/slb-e-stop-not-working/12030 "2024-04-22T01:37:08Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![CrookedWoodTex](https://forum.sienci.com/user_avatar/forum.sienci.com/crookedwoodtex/32/10446_2.png) [@CrookedWoodTex](https://forum.sienci.com/u/CrookedWoodTex)
#### Post date: [April 22, 2024, 9:37am UTC](https://forum.sienci.com/t/slb-e-stop-not-working/12030/2 "2024-04-22T09:37:27Z")

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Perhaps this thread / post will explain part of it.

> [@Estop and IOT relay](https://forum.sienci.com/t/estop-and-iot-relay/11855/11):
>
> Hey @Jstirrat, I can provide a bit more clarity on the E-stop, but not sure I can help with your actual question. The LongBoard receives power to its ‘brain’ using the USB connection cable. When you hit the E-stop, the power to your motors is cut, but if you flip over the board, you will see a small blue light on the board is still powered. This is the USB cable still providing power to your ‘brain’. To improve reliability, the new SuperLongBoard’s ‘brain’ now receives its power from the powe…

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