Bad wiring connection or internal wiring connection in the stereo
Leaving a stereo system all the time will likely cause no issues. Most modern stereo systems are 100 percent solid state and are not overly affected by heat.
Stereo system
Most likely poor wiring.
if its a stock sterio most likely its a delco
Aspirin is the NSAID that is most likely to cause ulcers.
Most likely a back up camera hookup.
most likely it its fuse blown out. replace the fuse if it is.
wired wrong as in constant flow most likely the red .. aka wire connected to the main power supply ... check your wire guide or install directions
Most likely a fuse(s) check them all if you havn't already
Carelessness and inattention is most likely the cause of someone to fall overboard.
The eccentric muscle contraction is most likely to cause discomfort in q5.
Lactate is the most likely cause of the burning one feels in the muscles.