Dwgs come out blue?

[SIMONBRATT]

Using acad14 over a network, using a hp755 in colour.<br>Some of our prints are coming out blue instead of expected black. i'm not a beginner, so please don't suggest anything too obvious.

 

[shadow]

well lets go thru the obviouse what are your pen settings are all pens set to black
ok if thats the cas then are you using a heidi driver for that 755 if not then you would be using the windows sytem driver and if thats the case you need to goto startbutton >settings>printers> right click on the printer goto propertie or document defaults goto the options tab and select color as grey scale then click on the color control button and set colors to pure black
if this isn't the case then check your pen settings to make sure that your black pen isnt set to blue if it is thats probably your problem if still does it run recover on the drawing i have seen where mino corruption or the start of corruption has caused some weird plot output