I don't know the technical details, but I assume it would be aligning signals to a specific frequency, or aligning frequencies to an optimum setting (I'm sure an electronics / physics geek can correct me on that).

Try the links to see how you monitor does.

http://www.techmind.org/lcd/phasexplan.html

http://www.lagom.nl/lcd-test/clock_phase.php

Cheers. yea was reading abit about it. Seems to be fixed now so no need for a new monitor