Not meant to sound silly, but have you verified that all your power paths were re-established afterwards? All UPS outlets plugged in, any UPS switched outlets are on, UPS is charged, computer power switch is on, and the UPS isn't "burnt out" from the surge? Based on monitor power, I assume the upstream surge protector is still good too? Sounds like you have some power maybe? For your power supply try unplugging both ends of it for a minute and then re-plugging it in.
Davemon50