For further information, I'm using the mircoliquidcrystal lib with a netduino plus.
Wired for 4 bit the LCD fails, wire it for 8 bit and it works fine.
I just got done testing with the SPI/I2C backpack and it fails similar to the previous 4 bit tests.
Reviewing the backpack design I'm convinced it is the 4 bit mode at issue perhaps it's the lack of implementation of the test pin.... Iv yet to identify a code workaround.
The LCD is fantastic visually, just wish it used fewer pins. How about making a backpack that can use 8bits?
. While we're at it, how about a 20x4 model...