First:
Go to the printer menu (not from PC!), the go to INK managment / setting. Then:
1) Check INK levels,
2) Print test page: Menu -> Ink managment -> Print quality
Your printer should print 1 sheet with dots blocks (4 of them: black, yellow, cyan, magenta). Check them, and compere them to any picture (you can find them with google "brother test page"). If there are any missing, do the printhead cleanning by following instructions form menu.
If testpage is empty:
- check the inks cartridges (did you remove this yellow foil befoure installing them into the printer?)
- ink system / printhead failure (the printer is damaged) contact service.