This is a long shot, but I'll try. One of my Pro-2004 scanners is showing signs of the "cold solder joints" issue that plagued this radio. I know that maybe 15-20 years ago, here was info where to start looking first, but all resources on troubleshooting this radio seem to be gone. I tried swapping out the 2 smaller boards that are easily accessed, but it dd not fix the issue. The only thing left is the larger main board which is not as easily accessed. Does anyone know where on this bard that it usually went bad? I don't have the patience to re-solder everything on it.