I agree with fm, that new posts with additional requests for help shouldn't be posted
to a a "SOLVED" thread since they are essentially hijacking the thread.
However, in this case there is something of value to learn for all those that read this
thread from the photo in Aero2011's post.
There are 4 ways a lcd backpack can be connected/soldered to the hd44780 pins
and two of them result in all the pins being connected backwards.
If you look at the previous responses in this thread:
#21 and then my response #22 right below it.
There is some question as to how the backpack board is to be hooked up to a LCD.http://forum.arduino.cc/index.php?topic=157817.msg1260780#msg1260780
There are several different PCB layouts for boards call calling themselves
"mjkdz" and the component layout and wiring to the hd44780 interface are
So far while there are different layouts, all the mjdkz boards I've seen
use a similar component placement as shown in response #21 and #22
which means the board has to be attached to the LCD with the 4 pin connector closer
to the center of the LCD not facing out along the edge and the backpack chips facing away from
the LCD module.
And the pot will is on the same side of the backpack as pin 1 on the LCD.
The best way to ensure proper orientation of the backpack
rather than just guess - (Guessing is ALWAYS bad) is to check
a known signal for location.
A simple signal to trace down is the contrast input signal.
The center connection of the pot will connect to pin 3 of the hd44780 interface.
If you look at Aero2011's photo, you can see pin 1 on the LCD.
It is on the left of the LCD or the side closest to the edge of the LCD module.
Pin 1 on a hd44780 interface is gnd for the controller.
Pin 16 is gnd for the backlight and is in the center of the lcd module.
If you look at Aero2011's photo, while it is blurry, it appears that the center
pot connection is connected to LCD pin 14 or 13 (it's probably pin 14)
rather than pin 3.
This backpack appears to to have been soldered on backwards. (upside down)
again, see my response to #21 for the details on the mjkdz boards I've seen:http://forum.arduino.cc/index.php?topic=157817.msg1261045#msg1261045
#1 thing to remember to get the backpack mounted correctly is
to trace down where the pot center lead goes. It must connect to
pin 3 of the LCD. If it isn't, it means the backpack is backwards,
flip the backpack over an it should now connect to pin 3.