For the past month, my 9500CI radar head gives me a display "check front receiver" after i turn the radar on for 1 minute. In the 1 minute before the warning, it does not alert to known K-band (cvs door). I think the radar head is broken. I just got an RMA number from escort and gonna send it in this week. This is my 2nd problem with the unit not working. The 1st was the rear shifter did not alert to the Ultralyte LR-B until i send it for a fix. My RX-75 is over 5 years old and the radar head still runs perfectly fine. Any 9500CI owners got any issue with the 9500CI not working properly?