Welcome to the forum.
We need more info. Do you have the base or BOSE system? Do you get sound when the CD is playing? Does the display acknowledge movement of the volume control?
2005 SL AWD, Platinum (Retired)
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
-Air Helper Springs