# Ender 3D PRO, upgraded to board4.2.7, and BL Touch - head hits against right hand side

**URL:** https://marlin.crc.id.au/forum/t/ender-3d-pro-upgraded-to-board4-2-7-and-bl-touch-head-hits-against-right-hand-side/430
**Category:** Support
**Created:** [26 November 2021 23:03 UTC](https://marlin.crc.id.au/forum/t/ender-3d-pro-upgraded-to-board4-2-7-and-bl-touch-head-hits-against-right-hand-side/430 "2021-11-26T23:03:12Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Lawrence](https://marlin.crc.id.au/forum/letter_avatar_proxy/v4/letter/l/2bfe46/32.png) [@Lawrence](https://marlin.crc.id.au/forum/u/Lawrence)
#### Post date: [26 November 2021 23:03 UTC](https://marlin.crc.id.au/forum/t/ender-3d-pro-upgraded-to-board4-2-7-and-bl-touch-head-hits-against-right-hand-side/430/1 "2021-11-26T23:03:12Z")

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Please help. I have tried many different firmware loads, latest from Creality, and latest from Marlin.  
All seem to have this issue of the print head normally going to the center of the bed, but then afterwards crashing into the right hand side. What could be wrong, and does anyone have an idea how to fix this?  
I have tried:  
Ender-3-Marlin2.0.1-ET300\_HW\_4.2.7\_SW\_1.0.3-20210306.bin  
Ender-3 Pro\_4.2.7\_BLTouch\_Marlin2.0.1\_V1.1.2\_TMC2225.bin  
Ender-3 Pro - Marlin2.0.1 - V1.3.1 - BLTouch - TMC2225.bin

Would really appreciate some assistance with this.

Regards,

Lawrence