HPL1906 screen has a pale blue tint / haze over that flickers over the screen I tried the buttons on the bottom of the monitor but they just changed intensity of the tint/haze

Try the monitor on another computer first, and check the security and condition of the VGA lead pins.If any are bent or missing that could be the problem. A missing pin will account for part of the signal not being sent from the graphics card to the monitor and could give the blue tinge. Loose connections are also culprits here.
Check there are no strong magnets neat the monitor.
Try a different monitor on your computer.

After that, I think that your monitor could be failing.