I do get to Texas from time to time...
One thing I would recommend in your instance is to plug in some cheap headphones and play music through your amp, then give the top panel a few hard whacks with your hand. If the music keeps playing uninterrupted, then it's rather unlikely that there are any other issues that may pop up. If the music drops or pops, then you may need to poke around a bit more to look for other loose/broken stuff.