ICL7107 not working on breadboard?
I can't tell for certain, but it looks like you have IN-HI connected to the +5V line (red wire) which matches up to the schematic, and the COMM pin (32) is going to the ground side of the supply. The COMM on these chips floats below the positive supply, and tying it down to the negative side will put the amplifier out of its common mode range. What that will do to the reading obtained isn't clear. 

The GND pin of the 7107 also isn't supposed to be connected to the ground side of the supply - the 7107 is supposed to have a split supply, but you can use a single supply if you generate the ground level with a regulator - I'm guessing that's what you're doing there, since the charge pump approach in the schematic isn't on the  board. Then you can connect the 9V between V+ and V- directly, and use the +5V regulator to feed the GND pin.



I fount this one here

What does happen when these go over-range is also not spelled out well, but there's a line in the datasheet - 


  This is because over-range is a low
  dissipation mode, with the three least significant digits blanked. 


page 7 of the datasheet

so that may be why you are seeing what you do on the display.

There's a test function built in - pull the TEST pin high and all the segments will light up. First I'd suggest that you get the supply sorted out so that the input isn't out of its common range.