My Display stopped working ... I don't think it's the cable and I don't think the nipple is damaged as it's still firmly attached ...

I was installing the knob kit .. I though everything went smooth but when I plugged it all together again the display flickers and the blue led above the knob dimms faintly for a few seconds and then it goes out completely ...

I checked the voltage and it's not 5v as it should be at this location ... http://www.hulktronics.com/buttons/pics/knobhookup2.jpg ... it shows only about 2.4v ....

one theory that I have is that I plugged the display ribbon back in, one pin over to the right (BY ACCIDENT), when looking at the front of the player and burned something.

What can I do now ?
What's wrong with my player ?

HELP please !!