Denon receiver optical input not working – 5 Solutions

Optical input is necessary for playing high-quality sound. It uses light waves to pass the signals to the amplifier. It is an essential part of sound-producing electrical devices. In some cases, the optical input of the Denon receiver stops working. There can be many reasons why visual working stops and starts causing problems.

Here are some reasons why your optical input stops working correctly. It is recommended that these issues be resolved before it’s too late. So, these are some possible situations in which your device is tangled.

1-Connection Not Secure

Sometimes, it happens when your connection is not secure. Changing the adapter can connect your connection. Sometimes, the real cause is your adapter when it is faulty and cannot work correctly. To overcome the optical input not working problem, you have to go through its initial connection and check if there is any problem.

You can go through the adapter directly because it might be the leading cause. It is not okay to delay the replacement of the adapter because the power causes damage to the entire internal system.

It is a helpful way to resolve your problem instead of wasting the device because its optical input is not working.

2-Faulty Cable

It means the cable of the device can be faulty. When the line is defective, the whole electricity generation process can be disrupted.

The faulty cable will not provide enough voltage and can directly cause leakage of electricity, which is quite dangerous for the human body. Excessive loss of electricity with high voltage can be fatal only if any organism touches it.

The problem with this solution is that you should replace the faulty cable with the working one. It will not cost more than your device because the Denon receiver, like your device, is more valuable and cannot be destroyed for minor reasons.

3-System Software Update

Every electrical device has installed software, which needs to be updated with time. You cannot use your device forever without any software updates. It will make your device and optical input stop working, harming your device.

It would help if you always took care of the system software of your device. New updates provide unique features that can smooth the device’s functioning and make it reliable for further usage. Also, the optical input can stop working because of old software.

With new updates, you can make your device’s optical input start working again.

Denon receiver optical input not working

4-Third party Sound System

It is a fact that often, the problem is your third-party speaker, which causes internal damage to your Denon Receiver sound system. If this is the case, then before connecting it with your Denon receiver, you must check the device first.

It is recommended because sometimes there are various viruses in the third-party device, which can ruin your system. It is said that Do not take risks regarding safety because safety comes first.

This is one of the possible reasons the Denon receiver optical input is not working. The problem can be resolved with a bit of effort and care.

5-Immature Compatibility

If your optical input is still not working and you reached this point while reading, ensure that your device and connected device are compatible. You can resolve the problem with just the right mixture of compatible devices.

Otherwise, you have to face a significant loss. Sometimes, low compatibility can work out in some situations, but no compatibility can cause severe problems in your device, like short circuits, improper functioning, and changes in voltages.

Also Read: when you are facing trouble in blinking of Nintendo Switch dock.


You can solve the problem by following these situations. In this guide, I have explained everything in detail. If you are reading this, then you must have found your solution. It is easy to resolve small solutions rather than throwing your device out of the window.

It summarizes the significant problems I gave you in this guide. This will help you if you carefully follow all the steps and implementation.

I'm a Professional Content Writer on and willing to write Articles on Technology-based Items. Writing basically is not my job but I consider it as my hobby and passion. I have been working as a Content writer for quite some time.
I'm a Professional Content Writer on and willing to write Articles on Technology-based Items. Writing basically is not my job but I consider it as my hobby and passion. I have been working as a Content writer for quite some time.