Check to see if it receives the weather bands. If not, these scanners had issues with the BNC antenna connector rocking too much and causing it to separate from the board inside. A little solder fixes the problem.
First, check the squelch setting. Try swapping the antennas between the scanners. While the cover is off checking the solder connection, if you have programmed only P25 systems (no conventional frequencies), you may have to adjust VR4 inside the scanner not receiving. It is marked on the circuit board.