Try using a little baking soda mixed with a little water to make a thin paste instead of the vinegar. The baking soda will neutralize any acid on the board. Rinse as well as you can with maybe a cotton swab and water. Let air dry for a couple of days, or use a blow dryer on low. I think the coating on the board is just a type of laquer, might be able to find something similar in an electronics supplier catalog. If everything seems to work, maybe the board is ok and there is something in the startup sequence? How you get it going real soon. Regards...Art
