I did not see THAT coming. It's not a solder defect.
The removed module measured 18 ohms to ground, a new replacement 24K.
So the module itself is bad. The heat seal on the bag had failed so maybe it popcorned during reflow or something?
I'm gonna bake the replacement before I put it on (which I had done for this one but maybe not long enough since it was thick?)
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Andrew Zonenberg
In response to this postPut new module on and reworked. I think some pins might not be making great contact (it turns on immediately without any sequencing delay, and PGOOD isn't going high - consistent with EN and PGOOD floating to their default states).
But I can proceed with bringup since the rail is on and stable.
1V8 (VCCAUX and VCCO_0 among other things) came up OK.
FPGA responds over JTAG! It's not a brick and it survived reflow.
Now to try bringing up the remaining rails so we can test it more thoroughly.
by Andrew Zonenberg ;
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