HP1015 splodge every third page

Joined
May 26, 2009
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1
Hallo, can anyone help please. I have an HP1015 printer. It's fine - except every third page comes out with a splodge at the top of the page. Sometimes it's quite faint, other times it's not - but if I want to print out something really smart, I have to throw away every third page and it's driving me crazy! Any suggestions welcome...

Thanks!
 
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