I have a G5 20" iMac model A1076 which will not power up. We had power outages this weekend from intense winds. I tried resetting the SMU and other various external things to absolutely no effect. I tried using this apple support guide. I removed the rear cover. When plugging it in, LED 1 lights up and LED 2 begins flashing slowly--even before I try restarting the computer from the internal power switch. I try that switch as well as the internal SMU switch. No change. still LED 1 is lit up and LED 2 flashes. Does this indicate that a new power supply should resolve the problem? Are there other steps I should try before buying a new PS somewhere online? thanks.