Yes you can cycle through the coils in the tests menu.
Turn the machine on, open the coin door and press the white button on the inside of the coin door twice.
Then press the start button on the outside of the coin door.
Press the white button inside again
Press start button again. You will now be in the coils test menu.
Pressing the white button inside the coin door will cycle you through the coils, if you want to activate the coil just press the start button. The coil number will be displayed in the "ball in play" window and also in the Player 1 window.
Coil 6 is the single and double drop target bank.
You will be able to test your other coils doing this as well. I would suggest you test all of them just in case there are others that might have issues as well. Also make sure that you have replaced all of the connector pins as well if you haven't done it already.
Ken Shipley's email address is email@example.com Just shoot him an email if you do want to get the boards looked at or better still, send him some pics of the board/s first so he can tell you what will need doing and might be able to give you a very rough ball park figure of what it might cost to repair it.
Keep us posted.