My computer won't come on.

If absolutely nothing happens (no noises, no lights, no NOTHING) then the two most likely causes are, in order of cost;
1, Power is not reaching the computer (outlet or surge protector turned off, circuit breaker blown, defective or loose power cord)
2. The power-supply has failed and needs to be replaced. I have found that eMachines have a tendency for the motherboard to fail when the power-supply fails (power surge from supply?). I would suggest having someone connect a used, known good power-supply to see if that will solve the problem. If not, you haven't spent the money on a new one.

HTH

Lilyoungun8, you need to be a little more specific; Check these:

1. Is the power from the mains turned on?
2. Turn it off from the wall socket and push the power cable back in, it may be loose. Then try turning it on again.
3. Hopefully it is none of the below, but if none of the aboe 2 things work, it may be one of these in increasing order of importance:
3.a. Your power cable is faulty - you will need to replace it
3.b. Your PC power supply is shot - you will need to replace it
3.c. Your motherboard has died - you will either need to replace it or buy a new PC altogether.

Do let us know...

- Quirino