I hope somebody here will be able to shed some light on this for me. I've searched and found nothing unfortunately. I noticed about a week or two ago that sometimes when I'm driving my radio will cut off...it turns back on immediately afterwards though. It's done that a few times a day and now for the past two days my car won't even start without the help of a battery jumper. It's not just that it won't start...no lights come on, no noises...nothing. My alarm won't even engage. It's just dead. But it starts with a jump. I had the battery tested by two different places...it's a good battery. I replaced the alternator a few weeks ago when I first noticed the stereo problem. I basically am an electrical idiot and really need some help with this! Thanks for any info.

James