Why did my radio stop receiving any am or fm receptions

my sonyradio cd and cassette playecfd-SO5 stopped receiving any am/ fm siginals, once in long while it works again , if i turn it off and on again i makes aloud pucking sound , then i get nothing just dead static ,very low volume static sound , if i turn the volume up the static will not increase either ,when i try to scan for a channel , it will not pick up anything, I live were there is a lot of stations to pick up, , but the casett deck will work, and no cd sound either? i brought it to a store to get fixed . he plugged it in and it worked , Took it home pluged it in . it worked , turned it on again next day , same problem , no reception on all levels am or fm? made a loud pucking sound ,when turning on the on button , turned it on agian this time no pucking sound and still no reception?