It has never stopped working once it's booted up... That's what really bothers me about the senero of a loose power/ground/harddrive cable connection... One would think that if it has to do with that, it would *possibly* come loose in my car... Not to mention that I have two JL Audio 15" Subwoofers, and I've seen the rearview mirrors in cars in FRONT of me shaking... I have NO CLUE how it would not shake loose enough to lock up the player if my problem had to do with a "loose" connection...