问：收音机打开，但没有声音

Hello, thanks for writing in about your 1991 Volvo 740. I would suggest checking all of the speaker wire connections as these often times run underneath seats and sometimes have more than one connection to get to the stereo. It is not uncommon for these to become disconnected or short out. As electrical issues can be hard to pinpoint, you may want to have an expert from YourMechanic come to your location to用收音机诊断问题第一手。如果运气最好。