Follow these steps to troubleshoot a distorted or garbled display on a laptop:

1. Restart your laptop and check if the display returns to normal.
2. Check all monitor wires and connections.
3. If your laptop has an AMD GPU, uninstall the old driver and reinstall a new one.
4. If your laptop has an NVIDIA GPU, uninstall the old driver and reinstall a new one.
5. Perform a system restore to a date before the issue started.