How to Fix Xfinity Status Code 340 – (Easy Fix Guide!)

Finn Wheatley Updated on
status code 340 on xfinity

Looking for solutions to fix the Xfinity status code 340? This guide will reveal everything!

Comcast Xfinity provides the best service plans for their customers. However, when you buy the Xfinity plan, you must activate it on your Xfinity box to use and access the services.

Well, here is when the status code “340” appears, which indicates a “lost” communication to the servers…

To resolve the Xfinity status code 340, users need to benign by checking whether the TV box is activated and whether all cable connections are intact.

The next step would be to check the Xfinity cable box and troubleshoot as well as check for potential Comcast outages.

Let’s continue to unwrap!

What Causes Comcast Status Code 340?

what causes comcast status code 340

Several factors can prevent the Xfinity cable box from activating and cause the status code 340 to indicate the loss of cable TV service.

The easiest way to approach the issue would be to see all potential causes so we can troubleshoot accordingly.

  • Temporal TV box fault or system-related glitch.
  • Full system memory or TV box cache data issue.
  • Wiring faults that impact the server connection.
  • Failed subscription renewal or account problems.
  • Service outages or servers are under maintenance.

Presented as concisely as possible, the aforementioned bullets contain all of the factors which are proven to bring up the status code 340.

The next step is troubleshooting so let’s jump in!

How to Fix Xfinity Status Code 340 in 5 Easy Steps!

Tip: Follow the steps in consecutive order for the quickest results!

1. Activate the Xfinity Cable Box!

activate the xfinity cable box

If you’re a new Comcast customer and you still haven’t used your Xfinity cable box because all you can see is “340”, well, your TV box is not activated yet.

From the user portal on the Xfinity website where you can easily activate the TV box and presumably resolve the code “340”.

If you’ve never activated a TV box before, follow the steps below:

  1. Open an online web browser on your computer/laptop.
  2. Enter xfinity.com/activate into the browser address bar.
  3. Enter your correct Xfinity account sign-in credentials.
  4. Also, enter your mobile number for verification purposes.
  5. Wait for a couple of minutes until you get a secret code.
  6. Shortly after the TV box will be activated and you, notified.

This process may take some time, so remain patient and let the process run to automate the activation process.

In case the TV box is activated but the error “340” appears, keep reading!

2. Check All Cables Connections!

check all cables connections

The wires in your setup play an important role in TV box communication to the Comcast servers and vice versa.

This is why it’s important to check and potentially find any cables connecting to your Xfinity cable box to be loose, frayed, or damaged. 

  • Inspect and secure the Xfinity cable box and TV cables to the appropriate port!

Here’s how to inspect the wiring in your Xfinity TV box setup easily:

  1. Press the Power button to switch off the Xfinity cable box.
  2. Unplug the cable box from the power adapter and outlet.
  3. Unplug the HDMI, power, and coaxial cable from the box.
  4. Inspect the connectors on all cables for any visual faults.
  5. Optional: If you have replacement cables, give them a try!
  6. If all of the cables are in good condition, reconnect them.

Important – Verify the Correct Ports!

To eliminate the possibility of connection errors such as “340” you need to verify the integrity of all calves and whether they are connected correctly. Use the table below for a direct reference.

important verify the correct ports
Comcast/Xfinity Cable Box Inputs – Explained
Type?Input or OutputDuty?Appearance:

HDMI
IN and OUT		(Input) – provide your cable box with feed from a source. 
(Output) – connects your TV box to the TV for video transfer.		How to Fix Xfinity Status Code 340 - (Easy Fix Guide!) 1

Power		INConnects the TV box to the power outlet and supplies A/C. There is a power adapter and a power plug.How to Fix Xfinity Status Code 340 - (Easy Fix Guide!) 2

Optical		INUsed to provide optical input to the cable box, which is later shown on the connected monitor or television (output device).How to Fix Xfinity Status Code 340 - (Easy Fix Guide!) 3
CoaxialINUsed to provide service input and is used by Comcast to deliver the service to their customers.How to Fix Xfinity Status Code 340 - (Easy Fix Guide!) 4


Ethernet

IN		Delivers “wired” internet to the cable box and the Ethernet cable plugs into the “Ethernet” port and the other side plugs into the network router.How to Fix Xfinity Status Code 340 - (Easy Fix Guide!) 5
Tip: The most-important connections to verify are the Coax input and Ethernet input.

3. Troubleshoot Xfinity TV Box!

troubleshoot xfinity tv box

There are a few quick methods that you can undertake immediately. These methods will tackle many possibilities for the status code 340 on Xfinity, and hopefully help.

The troubleshooting consists of 3 stages – software refresh, then a normal reboot, and finally a power circulation.

Use the Xfinity Troubleshooter Tool:

  1. Open an online web browser on your device.
  2. Visit xfinity.com and sign in to your account.
  3. Tap on the Account icon and then press Support.
  4. Navigate to TV & Streaming, then Troubleshoot.
  5. Choose the option “Restart a Single TV Box”.
  6. Click on your Xfinity box, then on the Restart Device.
  7. Choose Restart and click on Start Troubleshooting.

Restart Xfinity Cable  Box Normally:

restart xfinity cable box normally
  1. Locate and click on the A button on your remote.
  2. Navigate to access the Help menu on the TV screen.
  3. Press the OK button and choose the Restart tile.
  4. Again, press the OK button and select “Restart”.

Power Cycle the Xfinity Cable Box:

The final step of the troubleshooting would be to perform a power cycle. Simply, turn off the TV box first and then unplug from the power outlet for 2 minutes.

This is enough time for the TV box to discharge, cool down and hopefully, restore the connection to the Comcast servers.

Note: In case the troubleshooting didn’t help, don’t miss the next solution!

4. Check for Comcast Service Outages

Checking for service outages can save you time and effort when troubleshooting because it allows you to determine if there are any widespread issues affecting your Xfinity service.

check for comcast service outages

The Xfinity service status will tell you if the outage is on your side or globally, affecting your area.

Here is how to check the Xfinity cable box service outage:

Check for Outage Using a Browser:

  1. Launch the browser on your device.
  2. Go to the Xfinity Status Center.
  3. log in to your Xfinity client account.
  4. Check for the Service Outages:
  • Green Color – Normal Service.
  • Orange Color – Service Outage.

Check for Outage via Xfinity App:

  1. Open the Xfinity App on your mobile device.
  2. Sign in to your Xfinity user account in the app.
  3. Go to “Check Links for Service Interruptions”.
  4. Wait for 2 to 3 minutes until the app is searching.
  5. Check for service outages affecting your area.

If there is an outage, you may need to wait until it’s restored by the servers.

If there are no service outages in your area, continue reading the following solutions in the guide…

5. Factory Reset the Xfinity TV Box!

factory reset the xfinity tv box

In case you’ve been using your Xfinity cable box before without an issue but the error “340” started to appear out of a sudden, the factory reset should help.

This process will cleanly reinstall the operating system of your Xfinity TV box and will erase absolutely everything.

Tip: We recommend backing up data and settings you wouldn’t want to lose!

Here’s how to perform a factory reset on the Xfinity TV box in easy steps:

Factory Reset via User Settings:

  1. Turn off the Xfinity cable box using the remote control.
  2. Press and hold the Power button, to start booting up.
  3. Note: Verify that the LED indicator is blinking in green.
  4. Press both the Power + Menu buttons on the remote.
  5. Hold them, until the “User Settings” appear on-screen.
  6. Then select the “Restore Defaults” option and hit “OK”.
download xfinity my account

Factory Reset via My Account App:

  1. Download the Xfinity My Account app on your phone.
  2. Note: Available in Google Play Store and the App Store.
  3. Then, open the app and sign into your Xfinity Account.
  4. Select the “TV” tab and then choose your Xfinity TV box.
  5. Proceed by selecting “Troubleshoot” and then “Continue”.
  6. From the options select “System Refresh” and then wait.
Note: The factory reset might take up to 20 minutes so prepare with patience!

Need More Help?

contact xfinity support

If you need more help or are still getting the status code 340 on your Xfinity cable box, contact Xfinity Support for more assistance.

Also, don’t forget to share what you’ve already tried here!

Quick Recap:

In return to the Xfinity status code 340, we should reboot the Xfinity cable box, and check for service outages impacting our local area.

In addition, inspect the wiring on the TV box for potential looseness, bent cable connectors, or faulty “Coax” service input cable.

Make sure to check our blog for more Xfinity fix guides!

Read Next: How to Reset Xfinity Cable Box in Easy Steps?