The Spectrum reference code STLP-999 or SLP-999 error appears mainly on smart TVs and browsers. The solution requires just a few steps so let’s learn more…
Whenever your TV cannot connect to the Spectrum servers, in regard to a specific channel, you might experience a constant freezing, low resolution, or STLP error.
The “999” reference code hints that the service is unavailable, which might not always be the case.
To fix the STLP-999 error on the Spectrum application you need to reconnect your device to the WiFi and restart the app. Then you should proceed by resetting your TV network settings, clearing the Spectrum app cache, and reinstalling the entire application.
The “STLP” means that the device you’re receiving the code is a smart Samsung TV.
The “999” is the actual error code that indicates “Incomplete Request”.
This error could appear upon opening the Spectrum application on your Samsung TV or while watching a particular channel.
Here are occasions in which the STLP-999 code appears:
- Service or the channel is currently unavailable
- Slow or no WiFi/internet connection to your device
- Outdated Spectrum application
To localize the problem quickly, you would need to confirm whether the reference code appears when opening the Spectrum application or while you’re watching a certain channel.
Based on your findings you would know whether your network is involved in the problem or not.
Tip: Test streaming a different channel to test whether the reference code will pop up.
The best way to approach such a problem is by the method of exclusion. You’ll first need to target and resolve issues with your Samsung TV or failures in your network.
Only then we’ll focus on the spectrum and whether their services are currently online.
The STPL-999 reference code will always appear whenever your Samsung TV can’t connect to a certain Spectrum server or channel.
It does not matter whether your internet is slow or currently disconnected, whenever your TV can’t reach the server it will emit the STPL error.
This is why the best first move is to restart the application and reboot the Samsung TV to exclude the possibility of a local problem.
Here is how:
- Exit the Spectrum application.
- Turn OFF your Samsung TV.
- Disconnect the TV from the power outlet.
- Wait for at least 3 minutes.
- Turn the TV ON and test the Spectrum app.
The restart refreshes ALL services including everything involved in the connectivity to the Spectrum servers so your app should no longer have connection issues.
Note: Waiting for longer is always better than not waiting long enough!
On your Samsung TV, there is cached data for ALL previous connections to the WiFi including passwords, frequencies, and other technical data.
When your TV is unable to connect to Spectrum servers and the error STLP-999 appears, you should reset the network settings and reconnect to your WiFi.
Here is how:
- On the remote press the Source button.
- Choose the Settings cogwheel.
- Go down to General.
- Highlight and select Network.
- Press Reset Network.
- Confirm the prompt by choosing YES.
- Wait for the confirmation prompt.
When the network reset is done your TV will no longer be connected to the WiFi. You will need to press on Network Settings to set up your WiFi and reconnect the Samsung TV.
When you’re ready enter the Spectrum app and check whether the “999” reference code would appear.
Tip: For WiFi choose “Wireless” for Ethernet cable connection, select “Wired”.
We’ve already mentioned that the error code STLP-999 will appear, regardless of the cause is your network or the Spectrum servers.
In that set of thoughts, you should focus on solving issues related to your WiFi router/modem and the best way to start is by rebooting the device.
Here is how to restart your router:
- Press the Power Button on the back of your router.
- The LEDs should all turn OFF.
- Disconnect the device from the power outlet.
- Wait for around 5 minutes.
- Reconnect the router to the power.
- Turn ON your network device.
When the power cycle is complete and your router is working, on your Samsung TV open the Spectrum application and test for the error code.
Tip: Test the Spectrum app by sharing a hotspot from your smartphone for your TV to connect and stream content.
In case the problem continues to persist, proceed with the methods below.
Whenever you’re inserting your login credentials or billing info in any of your Samsung TV applications, that data is saved.
The so-called cache contains many files concerning each application’s settings, logs, and user’s activity.
Here is how to fix the “STLP-999” error, by clearing the Spectrum app cache data:
- On your remote tap the Home button.
- Go to Settings > Apps.
- Select System Apps.
- Select the Spectrum application.
- Press on Clear Cache.
- To confirm, press on OK.
When you’re ready with erasing the cache, it’s recommended to reboot both the TV and the application services. Use method #1 to restart both instances and then test.
Note: Clearing the cache data will disconnect you from the Spectrum account on the TV.
Your Samsung TV operates such as any other smart device.
You can download and install apps using the dedicated application store, as well as completely remove them from the storage.
This is why you should uninstall > install the Spectrum application to check whether that will help with solving the “STLP-999” error.
Here is how to cleanly install the Spectrum app:
- Press the home button on your remote.
- Select the Settings cogwheel at the top right.
- Highlight the Spectrum application.
- Press on Delete.
- Confirm the alerting prompt.
- Open the application store and search for “Spectrum”.
- Download & Install the application.
- Log in to your Spectrum account.
The steps above will ensure that your Spectrum installation is clean so you could give it a fresh start. Test whether the reference code error will still appear by reproducing the conditions.
Note: Never use app installation files from third-party websites and unauthorized services.
Since everything you’ve attempted to this moment suggests that the problem might not be on your side, you should check whether Spectrum is under maintenance.
Sometimes Spectrum servers could be down for the entire service or for only specific applications.
When Spectrum service is down you only need to wait for servers to come online.
You can check for ongoing maintenance on their social media or official website. In case of downtime, the alert message should be somewhere for everyone to see.
Sometimes whenever the error code STLP-999 appears out of nowhere and happens at random, the problem could be in your internet speed.
The internet could either be disconnecting, slow, or fluctuate which impacts the connection to the Spectrum servers.
To check your WiFi speed, use a free online speed test.
- Below 5 Mbps – STLP-999 is highly likely to appear.
- From 50 Mbps to 100 Mbps – STLP-999 could appear occasionally.
- Over 100 Mbps – No streaming interruptions are expected.
Based on your results you would know how to proceed.
You can either contact Spectrum TV support for more help or check how you can improve your internet speed.
To fix the Spectrum reference code STLP-999 you would need to power cycle your TV and reconnect to the WiFi. You should then check whether your internet is intact and conclude by performing a clean installation of the Spectrum application.
Read Next: Spectrum TV App Not Working on Samsung TV?
Now you should know what to do when you see the Spectrum reference code STLP-999. The solution mostly requires an inspection of your setup so there is nothing hard at all.
We hope that this post was helpful and you were able to prevent the error code from appearing ever!
For more posts such as this one check in our tech blog to discover an answer to your inquiries!
Kevin has over five years of experience working in various Tech startups and providing Technical solutions. He has contributed to many Tech publications and websites.