I have a 2001 sable and I installed and Kenwood kdc-155u awhile back and it worked perfectly, just recently it started shutting itself off and back on randomly and I can't turn it up to loud otherwise it resets. Sometimes it won't come back on at all for a little bit. What could be causing this? All my speakers work and I've checked the wiring and it seems to be fine. And ideas what could be causing this? The radio seems to get very hot after a little while of being on, is the radio junk?