Canon iP7250 and Win 10 seeing Red

My trusty printer is suddenly seeing red!
B & W output is normal but all colour pix suddenly have a heavy red overcast.
Have changed the Yellow and Cyan carts, tried all the dot boxes in Photoshop 9 (for outputs),
all to no avail...help!!

 

Sounds like a hardware issue to me. A print head might be clogged and bleeding.

 

You were right, it's a long time since this machine did anything wrong, I just forgot what to do !