monitor trouble

[steve trogdon]

I have a sun 4/110 with a Sony 16 inch color monitor. The monitor has
trouble returning to a usable state after it has been blanked by the
screenblank program for an extended period of time. After returning from
screenblank the background of the monitor is purple and may stay this way
for several minutes. Is there any knowledge of this trouble and if so any
known reasons why the monitor is having the trouble?