Why is 'Unsupported' shown on my Denon CEOL RCD-N8 display?
- JJennifer OrtegaSep 9, 2025
If “Unsupported” is shown on the display even though a CD is loaded, it could be that the disc is not properly loaded. Reload the disc.

Why is 'Unsupported' shown on my Denon CEOL RCD-N8 display?
If “Unsupported” is shown on the display even though a CD is loaded, it could be that the disc is not properly loaded. Reload the disc.
Why is the AirPlay icon not showing on my Denon CEOL RCD-N8 Car Receiver?
If the AirPlay icon isn't displayed in iTunes or on your iPhone/iPod touch, it could be because the unit and the computer or iPhone/iPod touch aren't connected to the same network (LAN), or iTunes or the iPhone/iPod touch don't have firmware that supports AirPlay installed. Connect the computer or iPhone/iPod touch to the same network as this unit and update to the latest firmware.
Why can't my Denon CEOL RCD-N8 Car Receiver connect to my favorite radio stations?
If you cannot connect to your favorite radio stations, it may be because the station is not currently broadcasting or is no longer in service. Wait a while before trying again. It is not possible to connect to radio stations that are no longer in service.
Why does my Denon CEOL RCD-N8 power turn off suddenly?
If the power turns off suddenly and the POWER indicator flashes red (at 0.25 second intervals), it indicates that the set is damaged. In this case, turn off the power and contact a DENON service center.
How to troubleshoot 'Server is not found' error on my Denon CEOL RCD-N8 Car Receiver?
If you encounter a 'Server is not found' error, it could be due to the computer's or router's firewall being activated, the computer not being powered on, the server not running, or the set's IP address being incorrect. Check the computer's or router's firewall settings, ensure the computer is turned on, launch the server, and verify the set's IP address.
Why can't my Denon Car Receiver play files on a USB memory device?
If your device can't play files from a USB memory device, the USB might be in a format other than FAT16 or FAT32, divided into multiple partitions, or the files are in a non-compatible format, or the files are copyright protected. Set the format to FAT16 or FAT32. When divided into multiple partitions, only files stored in the top partition can be played. Record the files in a compatible format. Files that are copyright protected cannot be played on this set.
Why can't my Denon CEOL RCD-N8 Car Receiver play files stored on a computer?
If you're unable to play files stored on a computer, it could be due to the files being in a non-compatible format, copyright protection, or connecting the set and computer via USB cable. Ensure the files are in a compatible format. Note that copyright-protected files cannot be played on this set, and the set’s USB port cannot be used for connection to a computer.
Why does my Denon CEOL RCD-N8 Car Receiver display turn off?
If the display is off, check the Dimmer setting. If it's set to “Off”, change it to something other than “Off”.
What to do if my Denon Car Receiver set does not work properly when remote control operated?
If the set isn't responding to the remote control, try the following: replace the batteries with new ones, ensure you're operating within the specified range, remove any obstacles between the remote and the unit, verify the batteries are inserted correctly according to the polarity marks, and make sure the unit's remote control sensor isn't exposed to strong light.
Why is 'No Network Connection' displayed on my Denon CEOL RCD-N8 Car Receiver?
If “No Network Connection” is displayed, it indicates that the network is not properly set up. To resolve this, select a source other than the network function or perform “Quick Setup”.
| Brand | Denon |
|---|---|
| Model | CEOL RCD-N8 |
| Category | Car Receiver |
| Language | English |
Essential safety guidelines for operating the device, including warnings and precautions.
Specific cautions regarding electric shock, fire hazards, and hot surfaces.
Steps for connecting the unit to a home network via wired or wireless LAN.
Instructions for setting the clock, including summer time, time zone, and manual/auto adjustments.
Methods for setting up wireless LAN connection using WPS (Push-button and PIN).
Creating and managing custom track playback sequences (program playback).
Information and operations for internet radio, including searching and favorites.
Playing music files stored on a computer via a network.
Information about integrating and using the Last.fm service.
Detailed steps for listening to Last.fm radio stations.
Automatically preset, auto-tune, manual tune, and cancel auto-tuning FM stations.
Searching for radio stations based on program type (PTY) or traffic announcements (TP).
Operations for playing, pausing, navigating, and controlling iPod content.
How to play files from USB devices, remove them, and use repeat/random modes.
Steps to stream music from iTunes on a computer to the unit.
Directly streaming music from iPhone or iPod touch to the unit.
Using the DENON remote control to play, pause, and skip tracks in iTunes.
Steps to initiate and perform playback operations using a DMC device.
Steps to enable network control and access the unit's web interface via a browser.
Detailed steps for configuring network settings like DHCP and Wi-Fi through the web interface.
Information on iPod compatibility, AirPlay, and Apple device requirements.
Specifications and compatibility information for MP3 and WMA file formats.
Details on supported USB file types, formats, and device limitations.
Information on internet radio functions and playing music from a computer server.
Details about the Last.fm service and its integration with the unit.
Resolving issues related to CD playback, such as unsupported discs or no sound.
Troubleshooting common problems with unit operation, display, and power.
Resolving issues with network audio, iPod, and USB playback.
Resolving problems related to Last.fm login, playback, and network connectivity.
Troubleshooting network connection issues, including WPS and signal reception.
Resolving issues with AirPlay icon display, sound, and connection.
Troubleshooting problems with remote control operation, such as battery issues.