Edges of display have pink and yellow cast due to magnetic charge.
Cause:
When a display unit is running for a long period of time (many hours or days), it builds up a large magnetic charge that can cause the edges of the display to have a pink or yellow cast.
Solution:
Degauss the display unit or turn it off.
Do one of the following:
1) Use the 'Degauss' button on the monitor (if available).
a) Locate the 'Degauss' button. Try one of the following locations:
1] Just underneath the lower front edge of display.
2] Inside a small control panel door on the display.
3] Along the left or right side of the display.
4] Somewhere on the rear panel of the display.
NOTE: For the exact location of the DEGAUSS button, consult the manual that came with the display unit.
b) Identify the 'Degauss' button and press it.
2) Turn the display unit off. Wait a while (for magnetic charge to dissipate). Turn it back on.