Whirlpool calypso

the washer has a digital board which will not come on therefore cannot turn it on replaced the elec control unit but was not the problem anything else i could check

Since you did not post a model number I am assuming you have the basic Calypso. There was some changes in the part, see this listing.

AP3837551

If you have it connected ok, check to see if power is getting to the board.

Here is a service manual for the Calypso which may help.

https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/2c1e295a88aaaae885256c5d004632a4/$FILE/8178010.pdf

Make sure all your contacts are clean and well seated.

If all checks out your interface board may be the problem.