Hi!
Welcome to Just Answer My name is XXXXX XXXXX X will be assisting you today to resolve or identify Your Problem.

Unfortunately what you have described indicates that your problem seems to be with the main circuit board it is not getting the power supply properly may be the battery contacts are defective please check them if they are ok then repair the camera because the repairing is not possible at home.

1. Remove the battery and memory card from the camera.
2. Let the camera sit with the battery and memory card removed
for approximately 20 minutes.
3. Clean your battery contacts with a clean cloth.
4. Reinstall the battery and power on the camera. If your camera still
doesn't turn on, unfortunately, your camera will require service to
correct the problem. I apologize for this inconvenience.