What to do if your nintendo 64 wont turn on?

Answer 1

The first step is to make sure there are no corroded cords/plugs/outlets and no unplugged cords. Then, make sure everything is hooked up in its proper place. If all is said and done, then it may be the N64 itself, and not the cords.

those are good steps to follow. I'll add a few more to help improve your chances of getting the Nintendo 64 to turn on again:

1. There maybe a problem with the power cord: sometimes a bad power cord could cause the Nintendo 64 not turning on. Check the wall outlet and verify that the power cord is properly inserted. If there is an extra cord around, swap the cord with another working power cord. Sometimes swapping the cord will fix the problem. Check the breaker in your home to ensure that the power outlet in use is active. Reset the breaker if necessary. Try another power outlet in another room.
2. Worse case scenario - bad circuit board: If the Nintendo 64 does nothing and has no response to the power switch being turned on, it may need a new circuit board. Or there maybe a solder weld or component loose on the circuit board. Take the Nintendo to a repair shop or DIY.

DIY Circuit Board Repair:

1. Remove the expansion pack cover.
2. Remove the expansion pack using a flat head screwdriver or a small spoon.
3. Remove the six screws with a Nintendo N64 Security Screwdriver.
4. Remove the front round feet.
5. Lift up the top cover.
6. Remove the 14 screws using a Phillips screwdriver.
7. Now take out the metal plate: go back and then upward.
8. Remove the two screws from the expansion pack slot connector using a Phillipp's screwdriver, remove the LED screw using the same screwdriver.
9. Remove the small metal bracket from the expansion pack slot connector, and then take out the small metal bracket from the front of the expansion near the expansion slot <- Use a flat head screwdriver for that.
10. Lift the small metal bracket using a flat head screwdriver.
11. Remove the seven phillips head screws with a phillips screwdriver, and lift the metal plate. Now you can see the circuit board.
12. In the rear of the Nintendo 64 near the edges of the circuit board there is 4 Phillips head screws - remove each one. Now the circuit board will come out.
13. Look it over closely on both sides - find any loose components or broken solder welds and repair.

Answer 2

1. Push the A/V cable cord in the N64 and into the A/V inputs
2. Attach the power cord to the wall and the N64
3. Remove the game pak and reinsert it
4. Unplug the controller from the N64, plug back in
5. Check power button. Push it in and out sometimes gunk will collect in there. pushing it in and out will help free the debris.

if there is still no power then seek a DIY repair tutorial or take it to a game store and have them diagnose it.