Im so sorry that no oneelse has responded to you.
Apologies for my delayin replying, I only just came online and saw your question. Are youstill looking for help with this?
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This is normally a "communications error"
This means that the upper and lower boards are not "talking " to each other.
Check the connections and the cable itself
Hello. My name is***** can help you with your question.
I've included one of your pictures with arrows pointing out what those cables plug into. From the pictures of the bottom, it appears as though the ones in the bottom are connected properly. But I would look for a similar plug on the top that that plugs into. It should just plug into it just like a telephone cord would slap into a phone or and outlet. I will attach the notated picture here.