Just in case anyone has the same problem with their IMID and finds this post.
I had the same problem with my car, a 2014 Honda Civic EX. The screen was bad.
Since 2020 my car was sitting out in the sun all day with not much driving and one day the screen just didn't turn on; but I could still hear the sounds when I pressed the controls on the steering wheel.
After searching online and troubleshooting on my own:
If it’s a fuse or connector problem more than likely you won't hear any sounds when you press the controls on the steering wheel for the IMID.
The IMID module has three pieces: The control unit (interface with steering wheel buttons), the screen and the air bag light.
Since I could still hear the sounds from the steering wheel controls and saw the lights for the "airbag off" sign working properly, I figured the control unit was fine and just the screen was damaged.
I looked online for the part number for my car on eBay but found it a bit expensive for a used part at $87.
The part number for my Civic is 78260-TR3-A12.
I was able to find a 2013 Honda Civic Coupe and a 2012 Honda Civic LX at a local Junker and got the part for $34.
My plan was to try to see if a different part number would work, and if it did not, I was going to separate the screen from the control unit and plug it on my car's IMID control unit.
Both IMID screens from 2012 (78260-TR0) and 2013 (78260-TR8) worked on my car.
Not sure what is the difference in part number.
I found this video very helpful on how to access the IMID for my car: 2014 - 2015 Honda Civic Dash Radio Removal How To Video
I bought a windshield sunshade to hopefully prevent the replacement screen from malfunctioning.