If a 500 error occurs only on specific pages, how do I narrow down the cause?

If the 500 error is page-specific, focus your debugging efforts on the controller, model, and view associated with that page. Start by examining the controller's action method for any potential errors. Then, check the model for database-related issues. Finally, inspect the view for any invalid HTML or PHP code. Use `var_dump()` or `print_r()` to inspect variables and ensure they contain the expected values. Also, temporarily comment out sections of code to isolate the problematic area.