blue screen crash on 2t xl - Hardware, firmware and software help

RE:

Marcos — Tue, 03 Feb 2026 20:17:27 +0000

I had exactly the same problem with my PRUSA XL 2T with firmware 6.4.0 while printing a very tall piece (28cm) using a single toolhead. The problem was that I forgot to remove a toolbox from the floor of the printer, and when the print was almost finished, the bed hit the box and the BSoD appeared instead of detecting a CRASH DETECTION on the z-axis.

RE: blue screen crash on 2t xl

CFIFerdi — Thu, 18 Dec 2025 20:20:54 +0000

It means the firmware was upgraded to v6.4.0, a buggy firmware that's well-known to crash tools into one another, or having other crashing issues. All that information (i.e. the memory stack, the CPU type/ID, and the C++ line causing it) is used by the software developers to remove the bugs. This, in a nutshell gives you an answer your first two questions.

How it can be avoided in the future:
1. Downgrade to the last working firmware (a.f.a.i.k., it's v6.2.6), then Factory Reset the printer, and redo the printer calibration.
2. Wait for the next release of v6.4.x which is likely to remove some of the bugs (while, undoubtedly, adding new ones ;-) ) .

I hope this helps.

blue screen crash on 2t xl

vahid — Fri, 05 Dec 2025 23:59:14 +0000

Can anyone help me with understanding what this means, what caused it and how can it be avoided in the future?

https://storage.googleapis.com/prusa3d-content-prod-14e8-wordpress-forum-prod/2025/12/72bf7bd5-img-20251206-wa0002.jpg