# Klipper Not Running after Ender Sprite Pro installation **URL:** \ **Category:** General Discussion\ **Created:** [January 9, 2024, 6:34am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982 "2024-01-09T06:34:14Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![ma1z](https://avatars.discourse-cdn.com/v4/letter/m/db5fbb/32.png) [@ma1z](https://klipper.discourse.group/u/ma1z)\ **Post date:** [January 9, 2024, 6:34am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/1 "2024-01-09T06:34:14Z")
### Basic Information: Printer Model: Ender 3 v2 MCU / Printerboard: 4.2.2 with gd32f303 [klippy (22).log](https://klipper.discourse.group/uploads/short-url/l8BQcYdap1Tqp7Li4jQFnUFUlVN.log) (632.2 KB) Hello, I created a thread previously when I was having trouble getting klipper up and running. I was successful, but I just installed an ender sprite pro extruder and have encountered the same error “cannot connect to mcu”. My printer was flashed correctly as it was working previously. It seems that the orangepi that I am using is no longer detecting the board of the printer because it doesn’t show up when I enter “lsusb”. I also do not see anything when I do ls /dev/serial/by-id/\*. The cable was also the same cable I was previously using. … ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [January 9, 2024, 8:27pm UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/2 "2024-01-09T20:27:17Z")
Did you try [https://klipper.discourse.group/t/how-to-trouble-shoot](https://klipper.discourse.group/t/how-to-trouble-shoot) ( Connection Problems to the Printer Board)? Please post all outputs (especially `dmesg`). Good luck, hcet14 ---
**Author:** ![ma1z](https://avatars.discourse-cdn.com/v4/letter/m/db5fbb/32.png) [@ma1z](https://klipper.discourse.group/u/ma1z)\ **Post date:** [January 10, 2024, 3:19am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/3 "2024-01-10T03:19:34Z")
I have tried some of the troubleshooting methods but have had some trouble interpreting some of the data. Here is my dmesg.txt file for you if you would like to take the look. It seems that the connection is not showing up despite the cable working before. [dmesg.txt](https://klipper.discourse.group/uploads/short-url/vyimtyPpAQAGYH9FGTnl9axcASs.txt) (120.5 KB) ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [January 10, 2024, 7:28am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/4 "2024-01-10T07:28:12Z")
What does ```auto ls /dev/serial/by-id/* ``` say? ---
**Author:** ![ma1z](https://avatars.discourse-cdn.com/v4/letter/m/db5fbb/32.png) [@ma1z](https://klipper.discourse.group/u/ma1z)\ **Post date:** [January 11, 2024, 1:27am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/6 "2024-01-11T01:27:40Z")
It says cannot access /dev/serial/by-id/\* no such file or directory but it was returning something previously. ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [January 11, 2024, 3:52am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/7 "2024-01-11T03:52:16Z")
If it ran before, have you checked all connectors after the conversion? Inclusive the USB cable? ---
**Author:** ![ma1z](https://avatars.discourse-cdn.com/v4/letter/m/db5fbb/32.png) [@ma1z](https://klipper.discourse.group/u/ma1z)\ **Post date:** [January 11, 2024, 8:07pm UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/9 "2024-01-11T20:07:42Z")
I have tried multiple different ports and checked the connection but have not been able to get it to connect to the printer board. ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [January 11, 2024, 8:37pm UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/10 "2024-01-11T20:37:37Z")
When you power on the printer, is there some LED glowing? ---
**Author:** ![ma1z](https://avatars.discourse-cdn.com/v4/letter/m/db5fbb/32.png) [@ma1z](https://klipper.discourse.group/u/ma1z)\ **Post date:** [January 12, 2024, 12:01am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/12 "2024-01-12T00:01:28Z")
If you are referring to a blue led on the board then yes there is. It just light6s up and stays lit when I turn it on. ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [January 12, 2024, 7:43am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/13 "2024-01-12T07:43:23Z")
What happens when you disconnect the extruder unit? ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [January 12, 2024, 11:35am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/14 "2024-01-12T11:35:50Z")
Just to frame the issue correctly: - From the information you have provided, it looks like that the board is not even recognized on OS / USB level - If it worked correctly before but stopped to do so after your modifications, then there is a chance that you might have caused - a short circuit, potentially even destroying the board - some other hardware defects that prevent the board from booting up I recommend checking this systematically: - Remove everything from the board - Attach the naked board to either a Linux or Windows computer - Check with the relevant tools, e.g. dmesg, if the board is recognized on OS level - If the naked board is not even recognized, then chances are good that you fried it - If it is recognized, then begin equipping the board one by one until it potentially fails again. ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [March 12, 2024, 11:36am UTC](https://klipper.discourse.group/t/klipper-not-running-after-ender-sprite-pro-installation/12982/15 "2024-03-12T11:36:30Z")
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