I had exactly the same problem(s) as you - worked for a couple of days and then stopped - happened twice - until I did what I suggested - don't think the ISO will help - definitely a driver issue...

That's surprising because I had to set it to print directly to the printer to make it work for both 15014 and 15019. I was not getting any text - just graphics. You can also go to the Brother site...

Set the printer properties to print directly to the printer and it should work again.