cannon printer problem

Have a cannon i860 .worked great until recently. Will print accurate colors with nozzle check ,Test sheet is blank.Prints colors. Changed black cartridges to no avail. Any suggestions appreciated.Thanks.

2 blacks
3 color cartridges.

 

Frank, maybe this?

http://en.allexperts.com/q/Printers-1512/Printing-only-color-black.htm

This is an old link but some ideas...

http://www.fixyourownprinter.com/forums/inkjet/16844

 

Like iSoles second link up top - a cleaning followed by a head refresh. Be wary dried out cartridges.
Should the hot water soak fail, a little AFTA (cleaning solvent) or turps to get the channels flow'in.

 

hi global, all good advice but nozzle check prints perfect black?.

 

Thanks you guys were right, I got fooled because nozzle check was good.but with two black tanks one nozzle is clogged .Attempting to clear it now.

 

Good, Frank! I've been fooled by those printer progs that are supposed to chk things out too, seems best to do it yourself.

Hopin' it works for you.