Hi Everyone. If I don't start my car and let it run every day the car will not start. I left for palm spring on Friday and came back today, Sunday and the car will not start. I just had it running Friday. I had a very powerful sound system installed recently and I don't remember this happening before the sound system was installed. Could the sound system be draining down the battery even when its not on? Do I need a new battery? Do I take it back to the place where I got the sound system installed? Please help. Thank You.