<p>I made two updates to my Ender 3 Pro: Silent Mainboard and BLTouch.  My printer head is way out of sync now. After I Auto Home, it moves along the X-axis to the left, hits the stop switch &amp; moves back to the right. It does not move at all on the Z-axis and remains 3 - 4&quot; above the bed during and after Auto Homing.</p>
<p>Here's the detail :</p>
<p>I installed a Creality Ender 3 Pro New Upgrade Motherboard Silent Mainboard V4.2.7 with TMC2225 Driver Marlin 2.0.1 &amp; bootloader pre-installed &amp; then a Creality BLTouch 3D Printer Upgraded Auto Bed Leveling Sensor Kit (the kit that comes from Creality with everything you need to install). I imagine I attempted too many upgrades without verifying the printer worked properly when I did the first upgrade which was the mainboard?</p>
<p>I purchased this Ender 3 Pro back in April 2020. It was working great until I decided to make the upgrades. I assume it came with an 8-bit board but not 100% sure. The new board is 32-bit and not sure what that would negatively impact besides maybe the LCD screen which does work fine after the upgrade.</p>
<p>Here's a video of the printer attempting to Auto Home :  </p>
<p><div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/X9S4rvv4lyA?start=0"></iframe>
            </div></div><br />
Note: Disregard the unhooked cable under the printer bed in the video.  It is totally disconnected and leftover from the BLTouch install.</p>
<p>Here's how I did the upgrade :</p>
<p>First, I simply replaced the new mainboard, and with the mainboard cover and fan back in place, I powered the printer on. The only thing I did here was to verify that the printer would power up ok.
It powered up just fine. The nozzle head did not move I don't think when powered on.</p>
<p>Next, I followed the instructions for the BLTouch that came with the kit.  I followed the instructions for the Creality V1 Mainboard 32-bit. Here, I upgraded the firmware via an SD card as suggested. The firmware I upgraded to is the <code>Ender-3 Pro_4.2.7_BLTouch_Marlin2.0.1_V1.1.2_TMC2225.bin</code>.
Finally, I powered on the printer with the BLTouch plugged in and new firmware installed. The BLTouch lights up and the touch sensor clicks out and in and few times.</p>
<p>Now, when I hit auto home the nozzle head moves like I described above &amp; remains in a position that I can not attempt to print from. I attempted to follow step #6 Platform adjustment 32-bit, working through the screenshots in the instructions.  This did not work.</p>
<p>If helpful, here are the positions of the nozzle head during the two upgrades :</p>
<ul>
<li><p>Position of the print head before install: 3-4 inches above the bed and maybe a little off-center on the X-axis.</p>
</li>
<li><p>Position after install mainboard upgrade: remained the same as before.  I just remember it powering on ok and then I turned it off / unplugged power to start installing the BLTouch.</p>
</li>
</ul>
<p>Position after install of BLTouch: remained the same. BLTouch lights up and the sensor tip moved in and out as if it was checking something or verifying it was working.</p>
<p>I'm a bit lost on this issue. Any help will be greatly appreciated!</p>
<hr />
<p>I'm using 3D4LYF's wiring scheme as I'm using the same set up I believe he is using. The two wires (white &amp; black) on the red connector go in the Z-axis endstop port on the mainboard. For the three wires on the black connector I have: blue=Ground, red=V, yellow=IN that goes in the other 5 pin port on the mainboard. I rearranged the wiring from red/blue/yellow to blue/red/yellow as suggested by 3D4LYF again because I am using the BLTouch Creality Kit. Adding photos of 5-pin port and the connectors:</p>
<p><a href="https://i.stack.imgur.com/cjHJv.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cjHJv.jpg" alt="enter image description here" /></a>
<a href="https://i.stack.imgur.com/LAtyD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LAtyD.jpg" alt="enter image description here" /></a></p>

[{'answer_id': 15814, 'author': 'wallwalker', 'author_id': 25913, 'author_profile': 'https://3dprinting.stackexchange.com/users/25913', 'pm_score': 3, 'selected': True, 'text': '<p>Resolved : connected the white &amp; black wires to the 5 pin output on the board.  This solved the homing issue.</p>\n'}, {'answer_id': 16704, 'author': 'Charles Smith II', 'author_id': 29279, 'author_profile': 'https://3dprinting.stackexchange.com/users/29279', 'pm_score': 1, 'selected': False, 'text': '<p>I had the same issue and thought I bricked it, so thank you for getting me on the right path! For Ender 3 Pro v4.2.2 motherboard, no Pinboard A, ISP Pinboard, or Burner required! In my case, I had used the provided pins (white housing) that were on the v4.2.2 motherboard itself.</p>\n<p>In doing so I had to switch the positions of the red and blue wires in the 3-pin connector (glad I pay attention to those types of things), connected white and black connectors right beside it as the OP has figured out (the connector my BLTouch came with was a little big so I had to cut a wall of the white housing a little; it fits really well), and re-connected the original Z-axis cable (did not need to remove to start with, but still unused as the BLT pretty much replaces it).</p>\n'}]
['https://3dprinting.stackexchange.com/questions/15799', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/25913/']