Just in case someone else comes across this thread & has the same problem..
Underneath where it says "Slide mini breakers"
follow the wires to a set of 4 across
copper bar connects them
there are tiny (size of a pen point) grey buttons
these reset the slides
FYI I also found another button there that has a yellow light. When pressed, this activate the remote system. 1st we thought the batteries in the remote were dead, then when new batteries were placed in it, we thought the remote was just broken.
Hope this info helps someone else