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Weird Error
Sometimes when I start my MK4S w/MMU3 I get a blue screen with an unknown error. Has anyone else seen this?
Posted : 14/12/2025 2:39 pm
1 people liked
RE: Weird Error
6.4.0 has been a disaster for MK4S/MMU. Try reverting to 6.2.6.
MK4S/MMU3
Posted : 14/12/2025 3:20 pm
Topic starter
answered:
RE: Weird Error
That's a good idea. I'll do that as soon as it's done printing. Thanks.
Posted : 14/12/2025 3:59 pm
RE: Weird Error
I've had the same problem since the 6.4.0 firmware update. If I press Reset, it restarts fine. It's reassuring to see I'm not the only one!
Prusa MK4 dans Original Prusa Enclosure et Prusa i3 MK3S+ dans PrusaBox
Posted : 17/12/2025 8:50 am
RE: Weird Error
Same error here, restart helps as workaround.
Posted : 20/12/2025 1:01 pm
RE: Weird Error
Exactly same error on my MK4s + MMU3 since update. Each power on generates this "unknown error"
Posted : 02/01/2026 10:16 am