Do you hear anything when you press the window switch? If you hear a grinding noise coming from behind the door panel it may be your window regulator and/or the motor. If you do not hear anything it may be a faulty switch or a power supply issue.
RepairPal Certified shops can diagnose and repair your 2002 Volvo S80. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.