2nd Monitor w/23" Cinema Display Issues

(I searched for this issue and came up empty.)
The story is: I just acquired a 23" Cinema Display and am using it as my second monitor for my p-book 17" (1.67, OSX 10.39).
It seems to want to mount the monitor completely arbitrarily. For instance, just now the monitor didn't load on startup, so I hit F7 and have to run in mirrored mode to use my p-book. When I restart, it still won't load up.
Occasionally I can get the Cinema Display to mount if I unplug it from the powerstrip for 20 minutes or so before plugging it back in before restarting, but this doesn't work every time. I can't predict what makes it work and what doesn't.
Is this an OS system issue, having to do with my p-book communicating with the Cinema Display, or is the display faulty? Also pertinent info: it is a refurbished display, direct from Apple, and received only a few days ago. It has always acted like this.
How do I ensure that my monitor loads up every time?

apranica,
Welcome to Apple Discussions.
I was informed of your question by my favorite daughter-in-law.
Since I am not Powerbook or second monitor conversant, the reply provided by arnie seems reasonable.
Have you tried that solution?
I believe that refurbished products are protected by AppleCare. Have you tried using your complimentary AppleCare?
;~)

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