MOTM

It's virtually impossible to fix this sort of thing without having the unit in 
front of me. It could be 1 of 100 things.

I will say that 99.999% of the time, I "fix" bad modules by just looking at the 
board and visually spotting something.
It's like proffreading your own English paper in high school: you don't want to 
see a problem so you don't. You hand
it to a friend, and they spot 3 errors in the first paragraph :)

About 80% of the time, I can spot the problem in under 15 seconds. It's usually:

a) not *enough* solder on something
b) the wiring is wrong ("I've checked it 10 times!!")

In 7 years, only 3 modules had a bad part.

Paul S>