Canon Powershot S80 Troubleshooting
Sometimes circuits go bad inside the camera as a result of water damage or trauma. Replacing the motherboard can hopefully resole these issues. Follow the Motherboard repair guide.
An easy fix, recharge the battery.
If the flash unit is damaged from trauma or water damage, it will require replacement. Follow the Flash repair guide.
When the battery has reached critical levels, the camera will reserve power for the vital systems, resulting in the flash not firing.
If the screen is cracked or broken, then it will need to be replaced. Follow the LCD repair guide.
If the Camera no longer makes sound, the speaker may be broken. It will need to be replaced. See the speaker repair guide.