Thanks, everyone for your thoughts. The Thin-Lite tubes were dark and looking more closely at the ballast board, it appeared to have blackened on one of the parts. Since the ballast is integrated into the light fixture, I went to an AS dealer and purchased a new fixture, 30 watts to replace the 16 watts light that was bad to get more brightness in the sink area. When I tried to wire the new light in, it still doesn't work and now the stove hood fan/light are not getting power and neither is the systems monitor. What have I done?