# Klipper fails to connect via can, flashing successful

**URL:** <https://klipper.discourse.group/t/klipper-fails-to-connect-via-can-flashing-successful/20428>\
**Category:** General Discussion\
**Created:** [December 3, 2024, 6:27pm UTC](https://klipper.discourse.group/t/klipper-fails-to-connect-via-can-flashing-successful/20428 "2024-12-03T18:27:11Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![DerKnerd](https://avatars.discourse-cdn.com/v4/letter/d/e47c2d/32.png) [@DerKnerd](https://klipper.discourse.group/u/DerKnerd)\
**Post date:** [December 4, 2024, 3:41pm UTC](https://klipper.discourse.group/t/klipper-fails-to-connect-via-can-flashing-successful/20428/10 "2024-12-04T15:41:46Z")

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I just followed this [post](https://klipper.discourse.group/t/mcu-unable-to-connect-via-canbus/16704/11) and noticed, it has something to do with the toolhead board or the cable. But I switched the cable twice.

I double checked that the jumpers for termination are set.

What confuses me the most is, that Katapult can successfully flash Klipper to the toolhead board and the mainboard. Only Klipper has the issue.

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_[View the full topic](https://klipper.discourse.group/t/klipper-fails-to-connect-via-can-flashing-successful/20428)._