The following information is meant to aid you in your explorations. I have attempted to educate you in such a way as to attract only positive energies to you and the board. However this is Not Full Proof. It is only a precaution. I would like to restate the warning that this tool is often taken to lightly by the general public and should not be used unless one has been trained thoroughly on the techniques of its use.
If you get an entity that does not seem positive do the above and then burn sage or sandalwood incense and "smudge" the board. That is to pass the board through the smoke a few times, telling the Entity, to leave and never return to you or your board. Also tell it to never try to harm you or yours again as you will not allow this to happen. The entity Will leave and Will Not return, as it must, because YOU are in control of the situation. It is only when you give way to fear that you allow the entity to have power over you. You need to know that Nothing can Hurt you that You do not Let or Accept. Tell It To Go Now! It will, it has NO Choice! So remember, Every time you use the board, wipe it and the pointer down. Visualize only positive entities speaking with you, and store it in white.
Another point I'd like to make is DO NOT EVER use the board when drinking or doing mind altering drugs, as this is a magnet for negativity and drags these negative energies to you. If you wish to have meaningful contact with positive spirits, then YOUR life needs to reflect that. Otherwise you may as well get a neon sign and put it at the entrance of your open portal, and let every wondering negative energy suck energy out of you. As you can see by reading this, I hope, that working with "Talking Boards" includes alot of responsibility. It's not a tool to be taken lightly of, Please keep this in mind when working with yours