What is the make and model and S/N# of the radio, low sound can mean a number of things such as a blown amplifier, bad capacitor, blown variable resistor etc.. Most radios can be repaired by using a DMM to test components such as transistors and other discrete components. But radios with LCD's require more specialized equipment.
" What were dealing with is the battle between the future and the past, between the powers that were and the powers that have yet to be. " --- John Perry Barlow