nelz wrote:Is it still blurred when you print a test page using the printer's controls (not from the computer)? If so, it's a hardware fault and needs to be returned if under warranty and replaced or repaired otherwise.
I was going to suggest that but looking at the manuals there are references to DOS / Win 3.1 / Win 95 & 98 & NT so it appears to be an old printer without the facility to do a test print from the control panel.
If memory serves the print heads are part of the replacement ink cartridge so may just need the 'head aligning'
If you are using the HPLIP Driver then that option is under actions.