Review on Aztech Compatible Toner Cartridge 4-Pack for HP 201X 201A CF400X CF400A Color Pro MFP M277dw M252dw M277c6 CF401X CF402X CF403X M277 M252 Printer Ink (Black Cyan Yellow Magenta) by Brett Robinson

I bought a box of new Aztech cartridges on January 28, 2021. Yesterday 4-3-2021 I used a new black cartridge to replace an old black cartridge. (The old black Aztech cartridge didn't print well even though it was 3/4 full, so I replaced it.) After installing the new black Aztech cartridge, the printer now prints with color bars across the page. I put the old cartridge back in the printer (to test the printer) and it no longer prints with color bars. This is the third or fourth time I have purchased Aztech cartridges from Revain.com. I am very disappointed with the quality of the new cartridges that were delivered to me in February 2021. Although the return window is closed, I am requesting a refund or replacement for the package of 4 cartridges that was sent to me.