I shut off computor last night and when pushing power button to power up the button makes a quick click, the lite flashes and nothing happens. I have tried changing power cords and plugging directly to wall outlets. Does anyone know what is wrong?

Hi. I am not a expert but firstly go for the simple stuff like: connections and check all cards ram and the rest are all seated and reseat if need be. I would change power supply I always have one in stock to troubleshoot, what bit I do. Its a bit of a pain if you have to purchase one and it isn't the fault. Possibly the switch, you could bridge the terminals on the switch with a small screwdriver very briefly to see if it boots. Just last week we had one in and it was both the psu and motherboard, seems like the psu blew and sent a spike through the motherboard ouch! Hope you find the problem soon