iMac system 9

[thefrogs]

I have just managed to get an iMac 333 up and running but I get a  
blue screen with a command line indicating a boot failure.
Otherwise I can get a screen up for about one and a half minutes  
before it blanks out.
The Drive is good. I can hear the CD spinning and loading but I  
cannot see what 's happening.
After the Commandline there is a prompt but I have no idea what  
should go next.
I have another drive with system 10 on do I load up unix to test the  
screen/video ram itsself
tom samson