Larry built his first computer in high school, running Linux, and it's 15 years old. Lately he's been having power issues and he has replaced the power supply, but still has the problem. Leo says that indicates a deeper problem on the motherboard. It could also be a failing video card, and the CMOS settings may be corrupted. Removing the battery and putting it back in will reset everything, but he may want to make sure all the cables are seated, and that the RAM is properly installed.