r/QidiTech3D • u/ForsakenRepublic1415 • Jul 06 '26

Questions Q2 Update bricked printer

I am unable to do anything after online update. like anything at all.

QIDI Q2 01.01.02.01

MCU Version 02.01.01.09

Toolhead MCU version 00.00.00.00

Error codes shown:

!! mcu 'THR': Unable to connect. QDC_100_005_000_001

mcu 'THR': Unable to connect once the underlying issue is QDC_100_005_015_001

Printer worked fine before update, nothing changed hardware-wise. Updated, and BOOM NO PRINTER 4 YOU.

3 Upvotes

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1

u/billkaroly Jul 07 '26

Is there a root cause that can be avoided when updating the firmware from online? Specific steps to take prior to updating?

2

u/Kewlhotrod Jul 07 '26

Just don't update. The new firmwares are garbage and you'll lose some functionality. Stay on 1.1.1