Grey-scale display

[Murray Kastner]

I've been helping a newbie set up her iBook. Everything is okay 'cept 
for one nagging problem, which I am sure is obvious to anyone but me.

Upon booting up, the screen jumps from color to grey-scale. Now, it is 
fairly easy just to use the System Prefs:Display to choose Thousands of 
colors and the color is back.

Can anyone steer me in the right direction so that when she logs in, 
she has color and not have to manually set it back to color?

TIA,

Murray