Had my Mac Computer on and we lost electricity for about 4 hours day before yesterday on Wednesday. When the power came back on I couldn't or have not been able to get my Mac Computer to come back on. I have tried unplugging it & plugging it back in to electricity, tried pushing the on/off button on back, restarted our WiFi but nothing has worked. I have it plugged into a power strip, also. Hope I can get some help.

Have you checked the power strip? Some have a circut breaker on them that can turn the strip off also have you tried plugging it into a different source?

Does it do anything when you try to power it on ?