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- Oct 12, 2008
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Third party toners we were most happy with magically stopped working.
Info and quote from driver page for HP Color LaserJet Pro M252dw:
Released: Mar 10, 2016
Version 20150716
Fix and enhancements
- Fixed an issue whereby the printer was improperly choosing to authenticate a non-HP supply using an HP digital signature. This may have unintended side effects for some non-HP cartridges.
At least they have a wee little warning on the drivers and downloads page.
See if you can locate the previous version of firmware and try flashing it.