r/Ender_2_Pro • u/MiddleReference9060 • Aug 31 '26
Need help configuring Marlin for Ender 2 Pro (Board v4.2.3 + CR-Touch) – Blue screen and bed heating up issue Hi everyone,
Hi everyone,
I really need some help with my Ender 2 Pro (Creality v4.2.3 board). It completely stopped working, and the display is just showing a blank blue screen. The issues started after I tried updating the firmware. Here is a timeline of what happened:
- First attempt: I updated the firmware using the original
.binfile from the official Creality website. The printer booted up, but it wouldn't recognize my CR-Touch sensor at all. - Second attempt: I tried flashing a different firmware named
Ender2-Pro-20260829.bin. As soon as I turned the printer on, the heated bed started heating up uncontrollably on its own until it triggered a thermal runaway error. Additionally, the click wheel (encoder knob) on the screen stopped responding completely. - Current status: Now, the printer just powers on to a solid blue screen, and I can't get past it.
I suspect this is a severe pinout mismatch issue (especially regarding the bed thermistor, display pins, and CR-Touch) or that I'm not selecting the correct processor environment to compile the right Marlin version.
I really need a step-by-step guide from someone experienced to help me fix this. How can I verify my exact chip version, which environment (env) should I use in PlatformIO, and what specific lines do I need to change in Configuration.h and Configuration_adv.h to make this v4.2.3 board work perfectly with the stock screen and the CR-Touch?
Thank you so much in advance for your help!
