No sound... I just bought a vrcd400-sdu.. I installed it myself, everything is clearly labeled. Everything seems to work properly except there is no sound.. I double checked my speaker wiring, it is all correct.. I have not yet hooked my big speaker and amp up, so I only have my 4 car speakers, do you have any suggestions?

Can't get the stero off of mute.

I also have problems with this. Worked fine for a week then it quit working.
Bought another one and installed it. With the first connector niether radio works. With the second connector both radios work but no sound. Apparently the connectors are defective. Wouldn't advise buying until they get the connector problem solved.

Hi XX,

Let's try the easy ones first:
1. try to do a reset of the unit;
2. check that all the speaker wirings are:
2.1 connected properly following the wiring diagram;
2.2 not bare/exposed and touching any metal part/chassis;
3. verify that the MUTE is not enabled;
4. try all signal sources: AM/FM, CD, SD Card, USB, AUX;
5. verify that the SEL is set to SUB OFF;
6. replace the CR-2025 Lithium battery of the remote.

If your concern has not been corrected after completion of the above procedures, you may need to:
a. open the unit for a loose connection and/or other diagnosis;
b. ask assistance from the manufacturer's Technical Service at 1-800-445-1797;
c. return the unit for a replacement.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Considering the VRCD400-SDU only puts out a typical 16w per chan and can only read memory cards/thumb drives up to 2gigs and seems either not work right outta the box or breaks shortly after installation.. save your money, buy a GOOD, name brand head unit(e.g. Sony, Pioneer, etc) that.. oooh I dunno.. WORKS? =) Solved my problem with said stereo =D Seriously though.. good luck in your efforts, doesn't seem that anyone on any thread has been able to solve the no sound problem which appears throughout the RoadMaster VR3 stereo line...