2012 MBA | External display problem

[japanime]

I recently purchased two MBAs for my company. One is a 2011 11-inch, the other a 2012 11-inch.

They are running side-by-side in our office, and are connected via HDMI to identical Mitsubishi external monitors.

The monitor connected to the 2011 model looks great — the contrast, colors and everything seem perfect.

The monitor connected to the 2012 model looks terrible — washed out colors, brightness and contrast levels that seem "flat." Also, sometimes when awaking from sleep, the external screen is completely blown out — practically white (even though the desktop "picture" that we use is a solid dark gray color).

At first, I figured it was the external monitors (or perhaps the HDMI cables). So, I swapped monitors and cables between the two MBAs.

Same result.

Has anyone here noticed the same thing between the video output of a 2011 model vs the 2012? Or do I have a bad 2012 on my hands?

Thanks in advance for any feedback.