Troubleshooting Samsung QN90B

Check timer or energy-saving settings: Some TVs have energy-saving or timer settings that might cause them to turn off automatically. Check and adjust these settings if necessary on your Samsung QN90B.

Ensure all cables are properly connected, especially if you are using external devices like game consoles or sound systems.

If the Samsung QN90B turns off after being on for a while, it could be an overheating issue. Ensure there is enough ventilation around the TV.

Make sure the Samsung QN90B is correctly plugged in and the outlet is working. You can test by plugging another device into the same outlet to check.

The Samsung QN90B has the following wireless connections:
Bluetooth Low Energy (BLE): Yes.
Wi-Fi Direct: Yes.
Wi-Fi standards: Wi-Fi 5 (802.11ac).
Bluetooth: Yes.
Wi-Fi: Y (Wi-Fi TVs ).

The Samsung QN90B television has the following Ethernet connections:
Ethernet LAN (RJ-45) ports: 1.
Ethernet LAN: Y (TVs with Ethernet port ).

You can connect the Samsung QN90B to the internet via a WiFi wireless connection or via an Ethernet cable. Consult this guide to see the steps one by one and with images.

If your Samsung QN90B does not have a signal, there are several steps you can follow to try to solve the problem:

Check cable connections: Make sure all cables, including the antenna, coaxial cable, or any other input cable, are properly connected to both the TV and the signal source (such as a cable or satellite box).

Verify the input source: Ensure that the QN90B is set to the correct input source (HDMI, DVB-T, cable, etc.). You can switch between different sources using the remote control.

Check the antenna or cable connection: If you are using an antenna, ensure it is correctly oriented and there are no obstacles blocking the signal reception. If you have a cable service, check for any service interruptions in your area.

Rescan channels: In the settings menu of your Samsung QN90B, look for the option to tune or search for channels. This may be necessary if the channel setup has changed or if you have moved the antenna.

Check on another TV: If you have another TV at home, try to see if it also has signal issues. This can help you determine whether the problem is with the specific TV or the signal source in general.

The most common problem when installing new applications on a TV like the Samsung QN90B is usually lack of storage space, check if you have enough storage space available on your QN90B. If necessary, delete apps or files you don't use.

Another possible cause is regional restrictions, some applications may have geographical restrictions. Make sure the apps you are trying to install are available in your region.

Finally, other possible causes could be an internet connection problem or TV compatibility, check if your TV model is compatible with the applications you want to install.

Pre-installed apps on the QN90B:
Lifestyle apps: Samsung Smart View.
Video apps: Samsung TV Plus.

The Samsung QN90B has de 4 input port where you can connect a Blu-ray player, game console, set-top box, Chromecast, Fire Stick, Xiaomi TV, or any other HDMI device.

HDMI ports are usually located on the left side or at the back of the Samsung QN90B. Simply connect one end of the HDMI cable to the TV and the other end to the device you want to connect. Then, using the QN90B remote control, select the video input source. Depending on the HDMI version, the TV may automatically switch to the correct input source when the device is turned on.

The Samsung QN90B has 2 input port where you can connect a hard drive, external memory, or USB drive.

Like the HDMI ports, the USB ports are usually located on the left side or at the back of the Samsung QN90B. If it is a hard drive, you will need to connect it using a USB cable, and if it is external memory or a USB drive, you can connect it directly to the TV's USB-A port.

The Samsung QN90B has Miracast support, this means that it has the protocol to be able to send the image that we see on our mobile phone, tablet or computer wirelessly using Wi-Fi Direct. Check out the following tutorial with everything you need to know to duplicate the image on the Samsung QN90B: Screen sharing on TV (Screen mirroring) .

Since the Samsung QN90B does not have wireless connectivity, to send the image signal from a mobile phone, tablet, or computer, you need to connect a device such as Chromecast, FireStick, Xiaomi Mi TV Stick, or any other dongle with Android TV or Roku TV to mirror the screen via Wi-Fi. Consult the following tutorial for everything you need to know about screen mirroring on the Samsung QN90B: Screen sharing on TV (Screen mirroring) .

If you cannot or do not wish to use a wireless connection to mirror the screen with the Samsung QN90B, you can perform "mirroring" (mirror mode) or send the image to the TV using an HDMI cable. For this, you will need to connect the cable to one of the HDMI ports of the QN90B and to the computer or mobile phone using a USB to HDMI adapter.