If it doesn't receive, then it doesn't work.
Most times if you have a good scanner, it will work until something goes wrong inside of the scanner.
Most times the problem is caused by having a transmitter too close to the receive antenna - ie - using a 2 meter / 70 cm radio in close proximity, or living next to a fire station, ambulance etc..

You can buy a cheap Woushun or Beofung handheld radio - that not only receives but also transmits for about $40 that will do the same thing!
Why throw good money at it to fix it when you can buy something else that is inexpensive.