Quoted from ChrisHibler:2. Black on pin 1.
3. "rake" pins 2 - 22 with the red probe. There should be no "chirps" of continuity.
4. Move Black to pin 2.
5. "rake" pins 3 - 22 with the red probe. Again...no chirps.
I do the same thing but with an analog multi-meter and watch how fast the needle moves.
To the OP, look at whether installing the 5101 is upsetting the reset signal.
Since you've used SIP sockets, put the board up to a bright light and look for solder shorts between pins/traces.