On Feb 14, 8:51 pm, "Dave Plowman (News)"
wrote:
Since it's common to both channels I'd first look at the power supply
rails feeding the audio amps - sounds like one leg starts off low then
gradually comes good, so likely a smoothing or decoupling capacitor.

--
*Why is the man who invests all your money called a broker?

Dave Plowman London SW
To e-mail, change noise into sound.

Thanks, it does sound like a good place to look first. Lucky me, I
found a source to get the service manual.