Anycubic just stops?

Hello everyone,

I'm having a problem with my Anycubic i3 Mega: The printer starts normally and prints without problems for a while, but then suddenly stops mid-print. The nozzle stays in place, the fans continue to run, but the entire system freezes and becomes unresponsive.

The display shows nothing except "Hotend Over." The temperatures are still displayed normally, but in reality, the hotend is cooling down. The printer completely freezes and can only be revived by restarting.

💡 Important information about my setup:

• I have printed via USB from my laptop and via SD card – both cause the same problem.

• The connection to the laptop remains active, Cura indicates that printing is still in progress.

• The temperature display freezes, but in reality the hotend is cooling down.

• I have already replaced the hotend completely, but the problem remains.

• I use the original firmware, no mods or modifications.

• Restarting the printer does not help, as printing will then start again from the beginning.

🔎 What I have already tried:

✔️ Different USB cable & different USB port → problem remains.

✔️ Printing via SD card instead of USB → Exactly the same problem.

✔️ Laptop remains active, no power saving modes → No impact.

✔️ Endstop status tested (M119) → No false triggering.

✔️ Filament sensor checked → Problem occurs even without filament sensor.

✔️ Hotend completely replaced → problem remains.

Does anyone have any idea what might be causing this? I would be very grateful for any tips! 😊