Neutralizing WiFi Drops on Samsung QN90B Smart TV 2025

The Samsung QN90B has quickly become a centerpiece for many living rooms, delivering stunning HDR performance and a sleek design that fits well with modern décor. Even with its impressive hardware, many users still experience intermittent Wi‑Fi drops that disrupt streaming, gaming, and smart home interactions. This guide focuses on diagnosing and eliminating those drops, ensuring your QN90B runs continuously without interruption.

Why Wi‑Fi Drops Happen

The first step toward solving a problem is to understand its causes. A TV’s loss of signal can stem from a variety of sources, ranging from simple environmental interference to more complex network configuration issues.

Physical Obstacles and Interference

The wireless signal has to travel through walls, floors, and other objects. Materials like concrete, metal, and even certain types of drywall can weaken the signal. In addition, devices that share the 2.4 GHz or 5 GHz bands—such as microwaves, baby monitors, and cordless phones—can introduce noise that interferes with your TV’s connection.

Router Limitations

Not all routers are created equal. Some older models struggle to maintain stable connections with newer 4K streaming devices. Even recent routers can become congested if many devices share the same network channel, especially on the crowded 2.4 GHz band.

Firmware and Software Issues

The QN90B’s operating system (Tizen) and the router’s firmware both play a role in maintaining a reliable connection. Bugs, outdated versions, or misconfigurations can cause the TV to drop out of the network.

Power Supply and Signal Stability

While less common, power fluctuations or inadequate power conditioning can affect both the TV and the router. If either device experiences a brief power interruption, it may lose its wireless link.

Diagnostic Checklist

Before you begin making changes, run through this diagnostic checklist to confirm that the issue is indeed Wi‑Fi drops and not something else such as cable interference or a hardware fault.

1. Check the TV’s Network Status
   On the QN90B, navigate to Settings → General → Network → Network Status. Note the connection speed and latency. A drastic drop in speed or frequent "connection lost" notifications indicates Wi‑Fi instability.

2. Confirm Router Status
   Log into your router’s admin panel and look for connected devices. If the TV appears but the signal strength is low or fluctuating, this is a strong indicator of wireless interference.

3. Try Wired Connection
   Connect the TV to the router via an Ethernet cable. If the wired connection remains stable, the problem lies with the Wi‑Fi link, not the TV hardware.

4. Observe Patterns
   Does the drop occur at specific times of day? Are there other devices on the same network experiencing similar issues? This information helps isolate whether the problem is network-wide or specific to the TV.

5. Run Speed Tests
   Use a device like a smartphone or laptop connected to the same network to perform a speed test. If the speeds fluctuate significantly, the router or ISP may be at fault.

If the diagnostic checklist confirms Wi‑Fi drops, move to the solutions below.

Basic Fixes for Quick Relief

These steps are often sufficient for most users and can be completed in minutes.

Reboot Your Devices

Power cycling is the simplest troubleshooting method. Turn off the TV, unplug it from the wall for 30 seconds, then plug it back in. Do the same with your router and modem. After both devices restart, reconnect the TV to the network and observe if the issue persists.

Move the Router Closer to the TV

If the router is located in a basement, attic, or far side of the house, consider relocating it to a more central position. A shorter distance and fewer obstacles translate to a stronger signal.

A router placed near the center of the house, away from thick walls and metal objects, will provide better coverage to the TV’s location.

Update Firmware on Both Devices

Check for software updates on the TV and the router.

• On the QN90B: Settings → Support → Software Update → Update Now.
• On the Router: Refer to the manufacturer’s instructions; typically you log in to the router’s web interface and look for a firmware update section.

New firmware often contains performance optimizations and bug fixes that improve Wi‑Fi stability.

Switch Wi‑Fi Bands

If your router broadcasts both 2.4 GHz and 5 GHz bands, try connecting the TV to the less congested band. The 5 GHz band offers higher speeds and less interference but has a shorter range. Use the TV’s network settings to select the appropriate band.

Disable Band Steering (If Supported)

Some routers automatically steer devices between bands. This feature can cause instability if the steering algorithm misclassifies the TV’s needs. Disable band steering in the router’s settings to keep the TV on a single band.

Advanced Solutions

If basic fixes do not resolve the problem, deeper adjustments may be necessary.

Use a Dedicated Access Point

Adding a dedicated 5 GHz access point (AP) in the same room as the TV can greatly improve stability. Configure the AP with the same SSID and password as your main router but use a separate channel to avoid interference.

Change the Wi‑Fi Channel

Manual channel selection is vital, especially on the 2.4 GHz band where many devices operate. Use a Wi‑Fi analyzer app to determine which channels are least crowded and set your router to that channel.

Reduce the Number of Devices

If the network is heavily populated, consider limiting the number of devices connected simultaneously. Disconnecting unused devices or scheduling heavy usage for off‑peak times can free bandwidth for the TV.

Increase the Router’s Transmit Power

Some routers allow you to adjust transmit power. Setting it to the maximum can extend coverage, though this may introduce interference to distant homes.

Employ Quality of Service (QoS)

Configure QoS settings on the router to prioritize the TV’s traffic. Assign the highest priority to the QN90B’s MAC address so that streaming traffic is handled first when bandwidth is limited.

Check for Firmware Bugs

Sometimes the router’s firmware contains bugs that affect certain devices. Look online for any reported issues specific to the Samsung QN90B or your router model. If a bug is identified, contact the manufacturer for a patch or apply a known workaround.

Use Ethernet Over Powerline

If moving the router or setting up an AP is impractical, consider a powerline Ethernet adapter. Connect one adapter to the router’s Ethernet port and a second adapter near the TV. This effectively creates a wired link over existing electrical wiring.

Using Samsung SmartThings for Network Insight

Samsung’s SmartThings app offers additional diagnostics that can help you isolate Wi‑Fi problems.

1. Install SmartThings on your smartphone or tablet.
2. Add the QN90B as a device if not already listed.
3. Navigate to the device’s Device Info page.
4. Select Network to view real‑time signal strength and connection status.

SmartThings provides a graphical representation of signal strength, making it easier to spot dips that coincide with drops.

Testing the Connection

After applying any fix, it’s important to verify that the Wi‑Fi connection has stabilized.

• Run a Streaming Test: Start a 4K movie or a high‑definition stream. Watch for any buffering or pixelation.
• Use a Speed Test App: Open a speed test on the TV (many streaming services provide one). Confirm that speeds match your ISP’s advertised plan.
• Monitor for a Few Hours: Keep the TV on the network for at least 24 hours to ensure long‑term stability.

Troubleshooting Checklist

Use this checklist to systematically address Wi‑Fi drops.

• [ ] Reboot TV, router, and modem.
• [ ] Update firmware on both devices.
• [ ] Move router closer to TV.
• [ ] Switch between 2.4 GHz and 5 GHz bands.
• [ ] Disable band steering.
• [ ] Manually set Wi‑Fi channel.
• [ ] Prioritize TV traffic using QoS.
• [ ] Connect via Ethernet or powerline.
• [ ] Verify ISP status and outages.
• [ ] Check for environmental interference (microwave, baby monitor, etc.).
• [ ] Monitor connection over 24 hours.

If the problem persists after completing the checklist, consider contacting Samsung support or your ISP for further assistance.

Final Thoughts

The Samsung QN90B is a powerful device that deserves a reliable network connection to deliver its full potential. By following the steps outlined above—from basic rebooting and firmware updates to advanced router configurations and dedicated access points—you can dramatically reduce or eliminate Wi‑Fi drops. The key is to systematically diagnose, apply the appropriate fix, and confirm that the connection remains stable over time. With a stable network in place, enjoy uninterrupted streaming, gaming, and smart home integration on your QN90B for years to come.