The answer to 'how to fix surge protection' is to replace your surge protector if it has been damaged or is no longer functioning properly. Surge protectors are designed to protect your electronic devices from power surges, but they can wear out over time or be damaged by a large surge. To fix a faulty surge protector, you'll need to identify the problem and replace the unit.
First, inspect the surge protector for any visible damage like scorch marks or a broken casing. If it appears damaged, it's time to replace it. You should also test the surge protector to ensure it's still providing protection - most have indicator lights that will show if the protection is active. If the lights are off or the unit is no longer suppressing surges, it's time for a replacement.