Welcome::
How old is unit? Brand, Model, type of unit would help greatly. Also some circuit boards are silk screened with component locations prior to the final release of the product and unnecessary components deleted. ( the items shown missing are not likely failures) Has the reverse side of board been thoroughly examined? If you are REALLY new to electronics,,do not turn any screws or adjustments. Do you have soldering skills? Can you power the device from battery? What is exact failure mode? (Dead, no sound, statitc, am or fm only,poor reception) GUESS,GUESS.