I am out of the country. Will take a look at your board after I get back Saturday next week.
To answer some of your earlier questions:
– all MCUs we ship are pre-programmed with the correct fuse bits. I assume yours are correct, otherwise you won’t be able to upload a program. in any case, did you by any change change the fuse bits?
– the default fuse bits set the MCU to use internal 8MHz RC oscillator. ‘Internal’ means it’s not connected to any external oscillator pins.
– The Ethernet controller typically draws about 180-200mA current during operation, so the power consumption is roughly 3.3V * 0.2 = 0.66 watt. Your measurement of 1 Watt does seem a bit high. How did you measure the power consumption?