Review on 🖨️ HP Q7551X Toner Cartridge - High Yield, Black by Paul Milonas

Warned by a previous check, I installed my cartridge shortly after receiving it to ensure it was working properly. This did not happen: instead of black writing, his darkest prints were about three-quarters black; and its mid-grays were almost invisible. I returned it for a full refund. The return process was simple and straightforward. I've never experienced that with HP LaserJet cartridges.