iMac 17" G5 power supply replacement
The iMac did not start up.
I was initially unsure whether to get a power supply with or without an ambient light sensor. I followed the video's recommendation and looked at the EMC number on the bottom of the stand. I ended up with the correct part. The repair went exactly as shown by the video. The iMac starts up now.
Watch the video. Get the EMC number.