Down Blueberry IMac 233mhz

[Imackid027]

just bought one of these for my sis n loved it so i went out n got another, this one was given to me and it doesnt the board is good because i used the other Imac i got my sis to check it powers on n everything so it must be the power supply or somthin because the system powers on and right before power button goes green it clicks and the power shuts off any ideas, I am a Very tech Savey Person i build Pcs for a living but im in the dark when it comes to Imacs so plz any help is appreciaited thanks

 

[Chamorro]

OK....relax & take a deep breath, and use some punctuation.

Does the "unplug it & plug back in" trick work at all? If not, it's either the video/analog board or the power converter board. You might have to try swapping boards w/ the working iMac to troubleshoot.