Please check the following.

If none of the problems are found, please contact us using the product inquiry form.

・The SW-54/SW-52ST connector is not firmly inserted.

・The SW-54/SW-52ST is incorrectly wired.

・The slide switch on the main board inside the SW-54/SW-52ST is set to [HOST].

・The optional external display (ED-74) is energised before the SW-54/SW-52ST is energised.