I just recently bought Toyota Camry SE 2006 with the mileage of 129k. After few days of purchasing when I tried to start, the engine won't turn on, nor any lights on dash. I thought the battery might be dead. I replaced the old dead battery with a new battery, and when I put the key in ignition it started but after 4 days when I tried to start again the engine won't turn on neither any lights show up on dash. Can you please tell me what could be the problem?