Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
One of the pads in the picture though does have a trace going to it, so it might be important... or not. I don't have the datasheet for the 4231 to hand. The pad in question goes to a via though, so you could always run a patch wire from there if you can't follow what chip it goes to next.