Sony mhc s3

Unlike old analog tuners, the new digital tuners will not output any sound or static if they do not lock onto a station.

you need a CD head cleaner try Best Buy they usually have one cheap it's a CD with little brushes on it

From Sony's Trouble Shooting site:

http://www.kb.sony.com/selfservice/microsites/search.do?cmd=displayKC&externalId=C154211&fes=true&mdl=MHCZX70DVD

If none of this helps, I suggest making sure your wires are correctly connected from your CD player to the speakers. Also, make sure no exposed wires are touching, it should make an audible hiss if they are touching anywhere.
If none of this helps, then I suggest taking it back to where you got it, may just be a dud.

Hope you get it working though,
Cheers.

You need to unscrew the Sony MHC-GX450 CD Shelf System where the player is located and pull the whole DVD/Cd assembly.I suggest you have it done by professional technician since the laser lens is very sensitive.If its not reading the CD cleaner it only means that the laser is worn out and needs to be replaced.

First unplug the unit and press the power button to make sure all the power is out of the unit. Try to take a cotton qtip and clean the lazer lense with alcohol. after wipe it clean with a new cotton qtip to remove the film the alcohol produces. Do not use a lot of alcohol and drip it all inside of the unit though.
Also if you tried a cd-r try a real copy instead. Make sure your cd's are ok.
Good luck.

After installing the cd display shows the Push Power in the model of MHC-RV5

I think grooves are dirty / clogged in sled section of lens mechanism. There is flexible wire between lens and circuit board and this should also be checked as it can be cracked or misaligned.
Below is exploded view of lens in MHC-GX470 and marked area to be checked or cleaned.

Get a lens Cleaning Disk and put it into the CD Player, there could be foreign objects on the lens itself, these and other shelf systems all have one common problem... Dust.
jon

alguien sabe espanol

It is not clear from your post that whether this is functioning perfectly other than the sound problem, if it doesn't, change the laser pick up.