Mattimus

I'm trained and dangerous Electronics Tech 😛 Here is what I did to solve this: I had the dreaded no-response 16 and 17 errors. The error means there's no contact with either motor controllers. So I reasoned that it's not a motor controller issue (BOTH would have to fail for this to happen) I looked at the connection between the Hand controller (HC) interface and the Motor controllers (MC) - and the connection looked fine (internally) I pulled up the menu to look at the version numbers. HC had a number but MC just showed "??.??.??" - so there's NO communication between the MC and HC. I next looked at the plug itself where the Hand Controller plugs in (the RJ-11 connector). The female receptacle had pin 3 recessed (it's supposed to spring out like the rest but was stuck down flat). With a very small L shaped metal tool I was able to free up that one spring pin. Then I plugged the Controller in and voila! It now works fine. The female connector on these boards are very cheaply built and may very well be the main issue with these. I hope this helps someone!!!!