Pool Neophyte

Pool Clown, please help or someone else who is knowledgeable in this area. I have a Jandy 1400 Aquapure and I just replaced the cell AND the sensor. I had previously checked the board and based on previous posts and it seems to be working fine. The problem is that it continues to show "no flow". It will start the cell reversing then go to flow and stop and then stay on no flow for the longest time. I have tried to reboot it by turning off the power, removed the 4 wires on the board, booted it back up from the Jandy, then shut it off, replaced the wires again but nothing except "no flow" Any ideas?