Yes there are several possible scenarios. It sounds like you've tried all the basics.
One common problem is that the BNC antenna connector becomes disconnected inside the scanner. Not likely if you were not touching the scanner at all. It happens over time as people connect & disconnect antennas or use the antenna as a handle.
Another common problem is the squelch potentiometer. Not as likely on that specific model, but it happens. They are a mechanical device. I assume you hear the rushing sound with the squelch fully counter-clockwise, and that would rule that out if so.
Are you monitoring conventional channels or only a trunked radio system. Many trunked systems are finally going through the rebanding process and leaving many older scanners like that one deaf. This only affects some MOT type 800 MHz systems, so there's a lot left that scanner can pick up (perhaps just not what you really want).
The next thing I see is a blown transistor in the scanner but there is very little in these scanners in the front end that will take out ALL channels. They really are several different receivers all ganged together. So I'd expect you to receive something in at least one band. Have you tried VHF low, VHF hi, aircraft, 400 MHz UHF and 800 MHz UHF bands? Weather is VHF hi so that's one that doesn't work.