Why would the brakes still make noise after replacing the pads and rotors on 1992 Volvo 240?

If the brakes still make noise after replacing the pads and rotors on a 1992 Volvo 240, it could be due to several factors. One possibility is that the new pads and rotors are not properly bedded in, which can cause squeaking or grinding sounds. Additionally, if there is dirt, debris, or moisture on the braking surfaces, it can also lead to noise. Lastly, worn or damaged components like calipers or hardware may still be causing the noise despite the new parts.