# MCU shutdown and prints fail

**URL:** <https://klipper.discourse.group/t/mcu-shutdown-and-prints-fail/12454>\
**Category:** General Discussion\
**Created:** [December 21, 2023, 4:09am UTC](https://klipper.discourse.group/t/mcu-shutdown-and-prints-fail/12454 "2023-12-21T04:09:32Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\
**Post date:** [December 21, 2023, 8:23am UTC](https://klipper.discourse.group/t/mcu-shutdown-and-prints-fail/12454/2 "2023-12-21T08:23:38Z")

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Are you using a Creality Sonic Pad or something like that? [Creality Sonic Pad and Alternatives](https://klipper.discourse.group/t/creality-sonic-pad-and-alternatives/6324)  
There is no real Klipper version visible and it looks different to me.

However this is your main issue:

```auto
Transition to shutdown state: Lost communication with MCU 'mcu'

```

Could be a bad USB cable or contact.

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