During a recent thunderstorm, I shut down my computer for protection. disconnected power. After the storm I reconnected the power and turned on the system and nothing. I have an e-machine model T2984 with XP Windows Home. I have looked inside the tower and can see a small green light burning. Am I missing a reset button or have I lost the power supply unit? The machine has worked great until this problem. The machine is approx. 3 to 4 years old. Anyone have any ideas?