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Q: Factory Installed Delco AM FM Cassette Radio is not working on 1990 Pontiac Bonneville

I noticed the radio does not work after having the fabric on my headliner replaced.

When I push the power button on the radio, I hear the speakers giving out a low static noise as it normally does. The digital display doesn't display the clock or stations, it's just black. I tried replacing the fuse with the spare fuse(not sure if the spare fuse is working) but I received the same results. Is there any wiring above my headliner that could have caused my radio to go out?

Also, before I had the headliner fixed, I noticed the battery was not seated properly and moved it back into place. I'm not sure if there was a sudden power outage doing this, and I'm not sure if my radio has a locking feature when power is out. After looking into my manual, it doesn't mention any unlock codes for my radio with cassette player, but it does mention unlock codes for the radio with a cd player. Normally, when a radio is locked, it says 'loc' or something to indicate that the radio is locked.

Anyone know if there is a lock? I found a picture online of the radio:
How do I know if the fuse needs to be replaced, I can hear the speakers giving out distortion as I raise the volume. Should i purchase a new fuse?

Is there a wire that may have gotten disconnected when the headliner was replaced?

Should I purchase a nice cheap stereo receiver?

Any advice would be appreciated, Thanks.
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