How do I fix this defective pixel?

I have one pixel just under the centre of my screen that appears blue sometimes.

I first only noticed this when the screen was completely black, and I assumed it was there to perhaps show that the screen is still receiving a signal or whatever. But today when playing Fallout I noticed that it appeared again. However as I am typing now it is not there.

Is there any way I can fix this problem myself, or is it something I have to report to Acer for their advice? I really don’t want to have to send the monitor back just for this small problem if I can avoid it.

Thanks.