Hello,
We are sorry, the POWER regulator is incorrect.
it should be AMS1117-3.3-sot223, but now it is AMS1117-5.0-sot223.
Wiznet chip should work at 3.3v and now it is a 5v regulator.
Please do not test your other 3 Ethernet Shield.
We will give you guys response soon.
Very apologize
Albert