Issues with Intel Imac 17"

[easez]

I have disassembled an Intel iMac 17". The current issues are the iMac doesn't turn on at all when I press the button. After disassembling the iMac, I notice 1 led light is lit green which is the one on the far left. The fan remains off. I do hear what I believe to be chimes.

Any help would be appreciated.