H2862 Will not power up

This is a common e-machines problem. You were right to change the power supply. Most e-machines come with dangerously (fire balls shooting out the back) low powered power supplies that can even catch on fire. Most people install their power supplies for e-machines backwards meaning they put the 20+4 pin connector in the 4 pin connector next to the processor and it fries. Others don't do anything and the computer is just fried. It's one of the reasons no one should buy an e-machine. If you want someone to fix it for you or you want a new machine and your files transferred go to www.mindblowingidea.com/ComputerRescue and you can get PCs with XP Pro or Linux.