
They are not working in my HP LaserJet Pro MFP M477fdw. I called GPC for technical support; Their so-called tech support told me to throw away the defective toners (no return required) and order a replacement from Revain. I did as ordered; A replacement came, which was also defective and was thrown away. Now Revain has billed me twice for these JUNK toners. I also purchased a set of toners from True Image (through Revain) for my printer as I could not get a promise of a specific arrival date for replacement GPC toners. True Image toners work perfectly in my printer! Replacement GPC toner and True Image toner ship same day; 09/13/2020!

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