In fact, there are a few things you can do to fix Panasonic Smart TV when one streaming service doesn't work while others do. 

These include checking the streaming service's website or app, restarting your TV, resetting your TV to factory defaults, updating your TV's firmware, and making sure your TV is connected to the internet and that your internet connection is strong enough.

If you've tried all of these things and you're still having problems, you may need to contact Panasonic customer support via https://help.na.panasonic.com/ or your internet service provider for help.

Here are 21 possible fixes for issues with streaming services on Panasonic Smart TVs:

1. Check for app updates: 

• a) Open the streaming service app on your TV. 
• b) Look for an option like "Check for updates" or "Update app".
• c) If an update is available, select "Install now" or "Install update". 
• d) Once installed, open the app again to see if the issue is now fixed.

2. Restart your TV:

• a) Locate the power cable for your TV and unplug it from the wall outlet. 
• b) Wait 2-3 minutes before plugging the cable back in. 
• c) Turn your TV back on and open the streaming service app to test functionality.

3. Reset your network: 

• a) Go to the Settings menu on your TV and find the "Network" option.
• b) Select either "Reset connection" or "Reset network settings". 
• c) Follow the prompts to reconnect your TV to your Wi-Fi network and enter your network password. 
• d) Open the streaming service app to see if the reset resolved your issue.

4. Uninstall/reinstall the app: 

• a) Go to the Content Store or app marketplace on your TV. 
• b) Find the streaming service app and select "Uninstall". 
• c) Follow the prompts to confirm you want to uninstall the app. 
• d) Find the streaming app again in the Content Store and reinstall it. 
• e) Open the freshly installed app and sign in with your account to test if it's working.

5. Restart your router: 

• a) Locate your Wi-Fi router or modem and unplug the power cable. 
• b) Wait 2 minutes before plugging the power cable back in. 
• c) Wait for your router to fully restart before trying the streaming service app on your TV again.

6. Check for software updates: 

• a) Go to the Settings menu on your TV and find the "System update" or "Software update" option.
• b) Select "Check for updates" or "Update now". 
• c) If an update is found, start the download and installation. 
• d) Once updated, your TV will restart. Open the streaming app again to test if the issue is resolved.

7. Change your DNS server: 

• a) Go to Settings - Network on your TV. 
• b) Select "Advanced options" or "Advanced settings". 
• c) Look for the "DNS server" or "DNS" option and select "Manual" or "Custom". 
• d) Enter a new DNS server address, like 8.8.8.8 for Google or 208.67.222.222 for OpenDNS.
• e) Save the settings and restart your streaming app to see if it's now working.

8. Enable developer options: 

• a) Go to Settings - System on your TV. 
• b) Look for an option like "Enable developer options" or "Developer mode". 
• c) Select that option to turn developer mode on. 
• d) You may find additional options now listed under Settings - Developer options or similar. 
• e) Explore the developer options for toggles that could impact streaming like "Web inspector" or "Disable HW overlays" and toggle them.
• f) Restart your streaming app to test if the developer options resolved the problem.

9. Disable energy efficient ethernet: 

• a) Go to Settings - Network on your TV. 
• b) Look for an option like "Energy efficient ethernet" or "EEE".
• c) Select that option and turn it off or disable it. 
• d) The setting may instantly restart your network connection. 
• e) Try your streaming service app again to see if disabling this feature helped.

10. Allow less secure apps:

• a) Go to Settings - Security or Settings - Safety on your TV.
• b) Look for an option called "Unknown sources", "Allow unknown sources" or "Allow installation of apps from unknown sources".
• c) Enable or turn on this option.
• d) Try your streaming service app again to see if this security change resolved the issue.

11. Do a hard reset:

• a) Unplug the power cable from your TV for 3 minutes.
• b) Press and hold the power button on the TV for 30 seconds while unplugged.
• c) Plug the power cable back in and turn your TV on.
• d) Go through the initial setup steps to connect to Wi-Fi and configure your TV.
• e) Open the streaming service app to test if the hard reset fixed the problem.

12. Disable firewall/parental controls:

• a) Locate any firewall, antivirus or parental control software on your TV or router and open it.
• b) Look for any options related to disabling or turning off restrictions and blocking.
• c) Temporarily disable any firewalls, and turn off any active parental control or content filtering.
• d) Try your streaming service app again with the restrictions disabled to test functionality.

13. Change your Wi-Fi channel:

• a) Log into your router's admin page by entering your router's IP address into a web browser.
• b) Look for the wireless settings or Wi-Fi options.
• c) Try changing the operating channel for your Wi-Fi from the default setting to either 1, 6 or 11.
• d) Save the new Wi-Fi channel settings on your router.
• e) Restart your Wi-Fi on your TV to switch to the new channel.
• f) Open your streaming service app to see if the Wi-Fi channel change resolved the issue.

14. Update your technology:

• a) Check if the router, modem, streaming device and TV are relatively up to date.
• b) Outdated equipment may not support the latest streaming video technology and speeds.
• c) If some of your equipment is several years old or more, consider buying more recent products.
• d) New networking equipment and 4K or Smart TVs usually provide better streaming functionality.

15. Re-enter account login details:

• a) Open the streaming service app on your TV and delete or sign out of any saved login info.
• b) Sign in again with your email address and password to authenticate with the service.
• c) This resets your login credentials and may resolve any issues with your account.

16. Try an ethernet connection:

• a) Connect an ethernet cable from your router to the ethernet/LAN port on your TV.
• b) Go to Settings - Network on your TV and select "Wired" or "Ethernet" as your network connection.
• c) Disable Wi-Fi on your TV if the option is available.
• d) Try your streaming service app again to test functionality with a wired network connection.

17. Adjust bandwidth settings:

• a) Locate any bandwidth throttling or data usage options on your TV or streaming device.
• b) Try increasing your streaming bandwidth and resolution to improve quality.
• c) Or decrease your bandwidth settings for a more stable connection.
• d) Make adjustments and try your streaming service again to see if it's now working properly.

18. Disable sleep timer and eco mode:

• a) Go to Settings - System or Settings - General on your TV.
• b) Turn off or disable any options for "Sleep timer", "Eco mode" or "Energy saving mode".
• c) These settings may cause streaming interruptions when enabled.
• d) With them disabled, try your streaming service app again.

19. Delete saved Wi-Fi networks:

• a) Go to Settings - Network on your TV and select "Manage Wi-Fi networks" or similar.
• b) Delete all saved Wi-Fi network profiles except for your home network.
• c) Extra networks can sometimes cause connectivity issues.
• d) Try your streaming service again with just your home Wi-Fi connected.

20. Restrict background apps:

• a) Go to Settings - Apps or Settings - Application manager on your TV.
• b) See if there are any options for "App permissions", "Background apps" or "Restrict background activity".
• c) Enable settings to restrict background apps from running on your TV.
• d) Freeing up resources may help resolve issues with your streaming service.

21. Buy an external streaming device: 

• a) Purchase a streaming box, stick or dongle that plugs into your TV's HDMI port. 
• b) External streaming devices often provide better performance than built-in Smart TV features.
• c) Try your streaming service on the external device to test if it resolves any issues.

We hope this guide has been helpful.