> I could spot black on two out of three...... this probably means you need to calibrate your monitor a little bit better. no need to use an expensive (spyder)

> I could spot black on two out of three...... this probably means you need to calibrate your monitor a little bit better. no need to use an expensive (spyder) tool unless you're a graphics artist, but if "not black" shows up as pure black, you might want to do some simple adjustments to at least make sure you can see a full colour range (just google "monitor calibration", there's many simple tutorials).