I wish I should have not wasted my money on this Brother MFC7820 compatiblke Drum Unit. I have tried it several times to install it but it keep saying on the window-screen of my printer that it is Drum Error, take drum out, slide the blue tab several times from side to side and return it back to the corner on right (triange point). I put drum unjit and toner cartridge assembly into the printer while keeping front cover open . When the monitor showed Replace drum, pressed 1, it swhowed acc

Reply by our customer service

Dear customer ,thanks for your kind reviews .Can you contact our 24 hours customer service for help ?We cover one year warranty for it .You can reach them by calling 18669797463 or sending live chat (from Monday to Friday )or email inquiry to us .We are more than happy to help you here .Thank you !