Problem with our oil press no power not start work

Problem with our oil press no power not start work

About a week days ago,we had sent our Bolivia customer a piece sample of oil expeller press machine, after a long time delivery, the oil expeller machine is now arriving at my customer’s hand, and they made a test for it.
but problems occurs. the oil mill machine does not start to work, it seems that the input voltage is correct, no data displayed in the control pannel. no power.
That is the problem causes the receiver wants to send it back to us.
after we consulted our technician to make a confirmation about the
problem. he analyzed that maybe the cord that connected with the front
electron coupler and the bottom shell of oil press machine is
not connected well, after such a long time delivery, it maybe loosen. so
we just reacted to our customer. and send him a video,showing how to
disassemble the oil expeller machine and how to re-assemble it.