(From a previous thread)
If everything else checks out OK then it may possibly be cracked solder joints in the DME computer.
I had to use sunlight and a magnifying glass to see these, looking at the joints from different angles helped me spot the problem.
Once you have the box open, you have to remove the circuit board to access the solder joints.
Carefully disassemble these corner supports by pressing the center pins out of them.
Then squeeze the end of the support to slide it out.
My three cracked joints connected this component to the circuit board.
I used a butane soldering iron, It lets me hold close to the tip and there's no cord in the way.
