I'm having terrible luck lately..
my "RGB LCD Shield Kit w/ 16x2 Character Display" wont even power up, no back light, nothing.
followed instructions for panel mounting, but I chose the ground next to the 5v. (easier drilling for pin spacing) no go, so soldered on the rest of the analog side pins, no go..
I have checked all solder joints, no cold joints or bridged.
how do I go about testing what is not working?

