'The capacitor by the USB port is in still place'. But it is probably of the solder in variety. Possible dry joint there, which could have been made worse by the original incident. Only way to be sure is to check the underside. However, components are heat sensitive, so if it needs resoldering it should be done with a suitable iron, and a heat sink should be used (not so critical with capacitors, but it's best to be sure). Worth trying before going further with the (probably expensive!) investigation.