Quote Originally Posted by omnedon
1st revision SNES's were heavier (due to the sound module being a separate daughtercard), and had a eject lock as part of the 'on' switch. (on= locked, off = open)

2nd revision had everything on the motherboard (lighter), and no lock.

Both of the above look the same from the ouitside, not to be confused with the SNES2.
Interesting. Which ones yellow, or do both do that?