code nd replaced drain pump

[Silverfox]

Model Number: wf306bhw/xaa
Brand: Samsung
Age: 6-10 years

draining problem/samsung silvercare
Model Number: WF306BHW/XAA

I keep getting the error code nd. The water won't drain from the washing machine. I've checked the hoses and they are all clear. i can gravity drain washer then it runs a cycle pump does not kick on. I also removed and examined the pump and there are no obstructions there either. I also replaced drain pump. it jumped once. When pump usually engages i hear a small click by control panel. When I gravity drain washer the nd code goes away. i have checked all connections & panels, I looked for burn marks or corrosion.
I'm running out of ideas here. What am I missing here?

[Doc Ryan]

When the washer should be draining the water out of the washer you will need to check to see if there is power going to the drain pump motor. If you don't have approximately 120v going to the pump when it should be draining then you have a bad main control board that is not sending power to the pump motor. Let us know what you find.

This is the main control board for your model washer:

Main Control Board - Part # PD00002112 (mfg # MFS-FTWTHA-00)

[cathyb]

how can I get to the main board on my Matag Neptune washer? I have replaced the pump and still nd shows.