Honda Integra 97 Headunit Wire Help

My friend got into my car today and accidentally bumped the right hand side of his passenger seat with his leg.
After that my head unit wouldn't turn on. I also realised that the USB cable was not working and neither was the lighter thing you pushed in and heats up. I'm guessing a cable disconnected or something?

Does anyone have any idea what it may be so I can look it and try fix it? I'm not quite sure what to be looking for.

Thanks in advanced! :)

Hi, try checking your fuses could have blown. Also there should be a fuse box under the bonnet check that aswell.

Factory or aftermarket headunit?

It ended up being the fuse under the steering wheel. I guess him bumping it with his leg and the fuse blowing at the same time was a coincidence.
:)