I have a Sony DA333ES 32 bit digital receiver and have been having
sound issues lately. The unit was purchased new in March 2000.

Of late, sometimes (and sometimes everything is fine) I have no sound
at all or will only have sound when I turn the surround field off.
Occasionally it will "pop."

All of my components vcr, dvd, are connected to the receiver (I have
Bose speakers.)

Does anyone here have any idea as to what my problem is?

Any help is appreciated.

Thanks in advance!