1.
last time (for many months) i print, it comes out perfect (black and white and colour)
but last week when i print, starting part there is printed perfectly, but as it goes on, there will be some lines not printed, y ar?
the ink still got half left leh
and i have been printing at least once per week
printer is bought in june 2007
brand: HP
bump~
couldn't find any software to check...
how to clean the heads anyway?
use tissue?
Try looking for it in the disc that comes with the printer. The printer software should have a function that allows you to clean the print heads by printing a very colourful document, though it may make your blood boil if you look at the amount of ink used.
Maybe some of the colours ran out...