It sounds like the storm damaged your system. You should get it serviced by an authorized repair center.
I have my iMac plugged in to a UPS (uninterruptible power source) that protects it from numerous types of power disturbances such as blackouts, brownouts, spikes and surges.
Even with these devices protecting my
computer, when a thunderstorm hits I still unplug the power and phone lines.
Once your system is fixed, it might be a good idea to look into power protection for your computer. Companies such as APC, Belkin & Tripp-Lite provide the hardware you'll need to prevent this damage from happening again.
I hope I've been of some help