Article in English: If your PS3 is frozen, you can perform a manual reset. You'll have to do this from the console itself, as your controllers are likely frozen as well. You'll hear three rapid beeps and your PS3 will turn itself off. Don't turn it on using the controller, as it may not detect the PS3. Your PS3 will likely attempt to check for errors on the disk. This may take a while, or it may complete in just a few moments.

Summary in Vietnamese:
Nhấn giữ nút nguồn (Power) trên máy PS3. Nhấn giữ nút Power trong khoảng 30 giây. Chờ vài giây, sau đó nhấn nút Power để bật máy trở lại. Cho phép hệ thống kiểm tra lỗi.