Wierd Epson 980 problem, help appreciated
 

been using this printer last few days, everything fine, no problems at
all,just colour pics,home made cd covers and stuff.
just printed a colour pic out this morning and theres yellow lines all the
way across the print.
Cleaned the heads and the other 2 colours are fine, but theres no yellow on
the test pattern, HOWEVER theres a thick yelow line across the bottom of the
test paterns.
Have changed the cartridge for a new one just incase, but im getting the
same thing
tried to do a line diagram below, firs 2 --- are the others 2 colours, NNN
is where the yellow should be but theres nothing, however the solid line
below is yellow!!
Yellow line looks to be printed about every inch down the page when a normal
printout is done


---- ----- NNN
---- ----- NNN
____________________Y


many thanks for any help
Si