Blown Fuse?

I have a Cobra radar detector and the tip of it unscrewed inside the outlet and when i tried pulling it out i saw a spark and my deck turned off and is not turning back on. Does anyone know what happened or can tell me how to fix it? I asked a friend of mine and he said i should check the back up fuse underneath the hood? Im unfamiliar with fuse boxes so can anyone tell me where they are located and what i should replace?

The “backup” fuse for the HU on a g2 is fuse 22 - 10A, [hot at all times] in the under dash fuse box, unlike most Honda/Acuras that have the “backup” fuse in the under hood fuse box:whisper: 94