Monitor problems

[Shermane Austin]

I am having problems with the Sony color monitor for my Sparcstation.  The
system is fairly new, and whenever I use it, the monitor keeps turning
off. I have to turn it off and back on to refresh the display which is
preserved. Sun has replaced the monitor, the CPU board, and the frame
buffer but the problem continues. I have moved it out of my office to make
sure it's not an external power problem, but the problem continues. Has
anyone had or know of similar type problems?  Please e-mail me if you have
a clue or a suggestion. The sun techs are still trying to determine what
the problem is, and my machine has been unusable for over a month - I am
getting desperate! Thanks.