Printer won't turn on after building in enclosure - Hardware, firmware and software help https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/printer-wont-turn-on-after-building-in-enclosure/ Prusa3D Forum Discussion Board en-US Tue, 12 May 2026 00:29:28 +0000 wpForo 60 RE: Printer won't turn on after building in enclosure https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/printer-wont-turn-on-after-building-in-enclosure/#post-778752 Mon, 19 Jan 2026 12:49:19 +0000 After unplugging everything from the Einsy board and plugging them back in one by one, the printer turned on and worked.

]]> Hardware, firmware and software help petere https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/printer-wont-turn-on-after-building-in-enclosure/#post-778752 Printer won't turn on after building in enclosure https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/printer-wont-turn-on-after-building-in-enclosure/#post-778155 Wed, 14 Jan 2026 21:31:30 +0000 I have a Prusa MK3S+ that was working correctly. I bought the original Prusa enclosure. After following the steps and placing the printer in the enclosure, it no longer turns on. With Claude's help, I started troubleshooting the printer. The next step would be to disconnect all cables from the Einsy board, but before doing that, I'd like to check if this is the way to go.

Things I've checked

  • The PSU is working correctly, outputting 24V measured with a multimeter
  • When I measure the resistance at the PSU connectors on the Einsy board, I get around 1.9Ω. Claude says this is not normal.
  • I disconnected the heatbed, the print fan and the hotend fan. Resistance is still measured at around 1.9Ω.

Should I disconnect all cables from the Einsy board and measure again? Is this the right route to go?

Thanks for your help.

]]> Hardware, firmware and software help petere https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/printer-wont-turn-on-after-building-in-enclosure/#post-778155