my iMac won't turn on...

We had a power surge a few days ago..

Both my iMac's went out..

When I went to turn them both on, the older one won't turn on at all?...

Ive tried holding in the button for a short while and also for a long while......

But nothing......

I think it's about nine years old, I think... roughly...

Is there anyway of it ever coming back, maybe??? :/