Back to “someone told me that the ptinting head is ruined because I used not original ink“. Can others respond to this claim?? Don’t think I ever bought original Brother cartridges for the MFC-J615W (now deceased). Used many discount cartridges for over 3+ years with well over 5,000 pages printed. Bought discount cartridges for the replacement MFC-J775DW, but still using the originals despite notice (for past 3+ months and over 1000 sheets ago) that 2 cartridges are LOW. IMO - if the discount cartridges do destroy the head, I will still have saved enough $$ to buy a new printer a couple years down the road.
I fixed my MFC-J615W by merely opening it up and jiggling the head left and right a few times. It is possible that I just needed to unplug it for a few minutes for error to clear. Hoping (and expecting) that I can run a few more reams of paper thru it before replacement. Extremely disappointed with Brother Support. Screen says refer to troubleshooting in User Manual - downloaded - nothing at all about 4F error code. 15 minute call with Brother Support, only thing they could tell me is ‘take to service shop’ - they could not tell what 4F meant. Call their recommended service shop - $79 just to diagnose but cleaning and adjustment was no extra cost. Asked what replacement of HEAD would cost “the tech will quote after diagnosis”.