did the search on "radio" came up with topics only with "upgrades" and "removals." my prblem is that all of a sudden, the radio has this "sharp-screaching like' sound while listening to the radio. the "ST" display will dissappear while the sound is emitted. it seems like it's not picking up FM signals. it happens to all radio stations. i checked that "black box" on the trunk and everything is plugged-in. i'm guessing the antennae plug that connect to the back of the radio unit could be loose. either my radio unit is broken or something wrong with my antennae? does anybody have similar problem?