Digital Clock Noise


I have a 1999 Panasonic DVD/CD H1000 that has developed strange noise in the left channel only. I have tried the player in two different systems and with different interconnects. The noise is subtle and can only be heard in the quieter passages of the music - but it IS there.

I would describe it as being somewhat like a tree full of little birds tweeting and chirping way off in the background somewhere - perhaps with some other "electronic" sounds added to the mix?

Is this digital clock noise? What might be causing it? Can it be fixed by a professional technician for a few hundred dollars?
poetcatullus
Please allow me to correct my description of the noise. It is not really like tweeting and chirping. It is like this:

If you pucker your lips and make a shooshing noise while pulling your cheeks in and out from having your mouth pointed to having it pulled back in a grin - that pretty much approximates the noise.

Comments, please?
Am I serious about how to make the noise or am I serious that the noise bothers me? I listen to only classical music and there are often soft passages where system noises can be annoying if they exist. If the right channel is noise free, why should I not expect the left channel to be noise free also? I happen to own two of these players and the other one does not produce this strange noise. I am hoping that a fellow Audiogoner will come up with the professional name of the noise so that I can communicate that to the repair technician instead of making weird noises at him. Oh well . . .