pjv

I have printed nozzle check pattern and flushed out the printhead a number of times and am finally getting the ink to flow. It seems that my problem was a badly clogged printhead and nothing to do with my firmware downgrade and key. I think you have a wonderful product.

I have tried to make my wf-3620 chipless and followed your instructions carefully. After the firmware downgrade process and using the key I bought, the printer screen said firmware upgrade success. I pressed 0 to turn off the printer and restarted after a couple of minutes. The wic reset utility informs me that my firmware version is cc 20 gc, release date 20/12/2016 The ink levels show 100% But I have a big problem-nothing prints. I have restarted the printer, performed head cleaning, charged the ink from the wic reset utility, reinstalled the cartridges, tried printing saturated colour bars but no ink appears on the paper. I have cleaned the print head with Printhead magic solution and alcohol. Liquid flows freely when doing this.I have tried two different sets of XL cartridges. Before I tried any firmware changes, I was having trouble with the printer recognising ink levels. Low ink warning of a particular colour resulted in that colour not printing well. This is the reason I tried to go chipless. Before the firmware change, I always managed to get a print, even if the quality was not the best. Now I can only print blank paper.