PLDT Los Light Blinking Red on Router- 4 Major Causes

Why is PLDT Los blinking red? If the lights on your router are blinking red, it typically indicates that there is an issue with your internet connection or the router itself. The exact meaning of the red blinking lights can vary depending on the router model and manufacturer.

In this article, we will explore the different causes of the PLDT LOS light blinking red on your router. We will in detail explain how to troubleshoot and the key methods either to prevent or solve the issue when it happens. We will also walk with you through the key steps to ensure your router is functional as long as the internet provider has connected to your home.

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PLDT Los Blinking Red on Router

Why does PLDT Los blinking red?

Here are some common reasons for PLDT Los blinking red and troubleshooting steps you can try:

  1. Internet Connectivity Issue: The red blinking lights could indicate that your router is unable to establish a connection with your Internet Service Provider (ISP). Here’s what you can do:
    • Check the cables: Make sure all cables (power, Ethernet, and coaxial) are securely connected to both the router and the modem (if you have a separate modem).
    • Restart the router: Unplug the router’s power cable, wait for about 10-15 seconds, and then plug it back in. Allow the router to boot up fully and see if the lights stabilize.
    • Restart the modem: If you have a separate modem, repeat the same process for it.
    • Contact your ISP: If the issue persists, contact your ISP to see if there are any known outages or problems in your area.
  2. Firmware or Hardware Issue: Red blinking lights could also be an indication of a firmware problem or hardware malfunction in the router. Here’s what you can try:
    • Check for updates: Log in to the router’s administrative interface (usually accessed through a web browser) and check for any available firmware updates. If updates are available, apply them and see if the issue is resolved.
    • Factory reset: If updating the firmware doesn’t help, you may want to perform a factory reset on the router. Keep in mind that this will erase all your custom settings, so you’ll need to reconfigure the router afterward.
  3. Overheating: Routers can overheat, especially if they are placed in confined spaces or near heat sources. Check if the router feels excessively hot. If so, try moving it to a well-ventilated area.
  4. Hardware Failure: In some cases, blinking red lights could indicate a hardware failure within the router. If the router is under warranty, contact the manufacturer or retailer for support and possible replacement.

Remember that the above troubleshooting steps are general guidelines, and the specific steps may vary depending on your router’s model and brand. Always refer to the router’s manual or the manufacturer’s support website for detailed instructions on troubleshooting the issue.

If you’re unsure about any of the steps or if the issue persists after trying the troubleshooting suggestions, it’s best to contact your router’s customer support or seek assistance from a technical expert.

How do I fix my blinking red LOS?

If the LOS (Link or Light on Signal) light on your router is blinking red, it typically indicates a loss of signal or a connection problem between your router and the internet service provider’s network. Here are some steps you can take to try and fix the issue:

  1. Check Physical Connections: Ensure that all cables connected to your router are secure and properly plugged in. This includes the power cable, Ethernet cables (if applicable), and any coaxial cables connected to the modem (if you have a separate modem and router setup).
  2. Restart Router and Modem: Sometimes, a simple reboot can resolve connectivity issues. Unplug the power cables from both the router and modem, wait for about 10-15 seconds, and then plug them back in. Allow the devices to boot up completely and check if the LOS light stabilizes.
  3. Check for Service Outages: Contact your Internet Service Provider (ISP) or visit their website to check for any reported service outages in your area. If there is an outage, you’ll need to wait for the ISP to resolve the issue.
  4. Check DSL/ADSL Filters (If Applicable): If you are using DSL/ADSL internet, make sure that all the phone lines in your home have the appropriate DSL/ADSL filters installed. These filters prevent interference between your phone and internet signals.
  5. Update Router Firmware: Log in to your router’s administrative interface through a web browser and check for any available firmware updates. If updates are available, apply them and see if the issue is resolved.
  6. Perform Factory Reset: If the problem persists and you have tried all other troubleshooting steps, you can perform a factory reset on your router. Keep in mind that this will erase all custom settings, so you’ll need to reconfigure the router afterward.
  7. Contact ISP or Router Manufacturer: If none of the above steps resolve the issue, it’s best to contact your Internet Service Provider or the router’s manufacturer for further assistance. They may be able to diagnose the problem more specifically and provide additional troubleshooting steps or arrange for a replacement if the router is faulty.

Check Physical Connections

Checking the physical connections is an essential step to fix the blinking red LOS (Link or Light on Signal) on your router. Here’s a step-by-step guide to ensure all the connections are secure:

  1. Power Cycle the Router and Modem: Before checking the physical connections, it’s a good idea to perform a power cycle of your router and modem. To do this, follow these steps:
    • Unplug the power cables from both the router and the modem.
    • Wait for about 10-15 seconds to allow any residual power to drain.
    • Plug the power cables back into the router and the modem.
    • Wait for the devices to boot up fully. This process may take a few minutes.
  2. Inspect the Power Connection: Make sure the power cable is securely plugged into the router’s power input and that the other end is connected to a functioning power outlet or power strip.
  3. Check Ethernet Cable Connections: If your router connects to your modem or directly to a computer using Ethernet cables, inspect these connections:
    • Ensure that the Ethernet cable is properly inserted into the LAN port on the router (usually labeled with numbers or “LAN”).
    • If the router is connected to a modem, verify that the Ethernet cable is securely connected to the WAN or Internet port on the router and the appropriate port on the modem.
  4. Verify Coaxial Cable (If Applicable): If you have a separate modem for your internet connection and it connects to the ISP using a coaxial cable, check the following:
    • Ensure the coaxial cable is correctly connected to the coaxial port on the modem and the wall outlet.
    • Ensure there are no visible signs of damage to the coaxial cable, such as fraying or crimps.
  5. Inspect Phone Line Connections (If Applicable): If you have DSL/ADSL internet, check the phone line connections:
    • Ensure all phones and other devices connected to phone lines have the appropriate DSL/ADSL filters installed. These filters prevent interference with the internet signal.
  6. Verify Fiber Optic Cable (If Applicable): If your internet connection uses fiber optic technology, ensure that the fiber optic cable is securely connected to the appropriate port on the router and the optical network terminal (ONT) provided by your ISP.
  7. Consider Cable Quality: In some cases, faulty or damaged cables can cause connection issues. If you suspect a cable is defective, try using a different cable to see if the problem persists.
  8. Check Indicator Lights: While inspecting the physical connections, pay attention to the indicator lights on the router. Take note of which lights are blinking red, as this information can be helpful when contacting customer support.

After checking all the physical connections, power cycle the router and modem once again to ensure any changes take effect. If the LOS light continues to blink red after completing these steps, you may need to proceed with additional troubleshooting or contact your Internet Service Provider (ISP) for further assistance.

Restart Router and Modem

If you’re experiencing a blinking red LOS (Link or Light on Signal) on your PLDT router, one of the first and most effective troubleshooting steps you can take is to restart both the router and the modem. Restarting these devices can often resolve connectivity issues. Here’s how to do it:

  1. Turn off the Router and Modem:
    • Locate your PLDT router and modem. They may be two separate devices or combined into one unit, depending on your setup.
    • Unplug the power cables from both the router and the modem. You may want to label the cables or remember which cable belongs to which device for easier reconnection later.
  2. Wait for a Few Minutes: After unplugging the power cables, wait for at least 1-2 minutes. This allows the devices to fully power down and release any residual charge.
  3. Reconnect the Router and Modem: Plug the power cable back into the modem first and let it fully boot up. Once the modem is online and all the lights indicate a stable connection, plug the power cable back into the router.
  4. Allow the Devices to Restart: Give the router a few minutes to boot up and establish a connection with the modem and the internet.
  5. Check the LOS Light: After the router has fully restarted, observe the LOS light. If the issue was related to a temporary connection problem, the blinking red LOS light should stabilize and turn into a steady green or another appropriate color, depending on your router model.
  6. Test the Connection: To ensure the issue is resolved, try connecting to the internet on your devices (computer, smartphone, etc.). Check if you have internet access and if the connection is stable.

If the LOS light continues to blink red or the internet connection is still not working correctly after the restart, you may need to perform further troubleshooting. Here are some additional steps you can try:

  • Check the physical connections to ensure all cables are securely plugged in.
  • Verify that there are no service outages in your area by contacting PLDT customer support or checking their service status page.
  • Try using a different Ethernet cable to connect your modem and router (if applicable).
  • If you’re using Wi-Fi, try connecting directly to the router with an Ethernet cable to see if the issue is related to Wi-Fi connectivity.
  • Contact PLDT customer support for further assistance and troubleshooting guidance.

If the problem persists despite trying the above steps, it’s best to get in touch with PLDT’s customer support as they can provide specific assistance tailored to your connection and router model.

Check DSL/ADSL Filters (If Applicable)

If you are experiencing a blinking red LOS (Link or Light on Signal) on your PLDT router, and you are using DSL/ADSL internet, checking the DSL/ADSL filters is an essential step to troubleshoot the issue. DSL/ADSL filters prevent interference between your phone and internet signals, and improper installation or faulty filters can cause connectivity problems. Here’s how to check the DSL/ADSL filters:

  1. Locate DSL/ADSL Filters: DSL/ADSL filters are small devices that look like dongles or plugs with a phone line connector on one end and an RJ-11 connector on the other end. You may find these filters connected to phones or other devices that share the same phone line as your DSL/ADSL internet connection.
  2. Disconnect All Devices: To properly check the filters, disconnect all devices connected to your phone line, including phones, fax machines, answering machines, and anything else using the same phone line.
  3. Reconnect DSL/ADSL Filter: Now, for each phone or device that requires a DSL/ADSL filter, follow these steps:
    • Disconnect the phone/device from the phone line.
    • Connect the DSL/ADSL filter to the phone line outlet.
    • Connect the phone/device to the other end of the DSL/ADSL filter.
  4. Check DSL/ADSL Filter Condition: Inspect the DSL/ADSL filters for any visible damage or wear, such as fraying cables or broken connectors. If any filters appear damaged, consider replacing them with new ones.
  5. Restart Router and Modem: After checking and installing the DSL/ADSL filters, perform a power cycle of your router and modem. This involves unplugging the power cables, waiting for a minute or two, and then plugging them back in.
  6. Observe the LOS Light: After the router and modem have fully restarted, observe the LOS light on your PLDT router. If the issue was related to the DSL/ADSL filters, the blinking red LOS light should stabilize, and the internet connection should improve.
  7. Test the Connection: To confirm that the issue is resolved, connect your devices (computer, smartphone, etc.) to the internet and check if you have stable connectivity.

If the LOS light continues to blink red or the internet connection remains unstable, there may be other factors contributing to the issue. In that case, you should consider performing further troubleshooting or contacting PLDT customer support for additional assistance. They can help diagnose the specific problem with your connection and provide further guidance to resolve the issue.

Updating router firmware

To update router firmware, here are the general steps you can follow:

  1. Check for Firmware Updates: Visit the official PLDT website or log in to your PLDT account to check for any available firmware updates for your specific router model. Look for a “Downloads” or “Support” section on their website.
  2. Download the Firmware: If a firmware update is available, download the latest firmware for your router to your computer or a USB flash drive.
  3. Access the Router’s Admin Interface: Connect your computer to the PLDT router either through an Ethernet cable or Wi-Fi. Open a web browser and enter the router’s default gateway IP address (e.g., 192.168.1.1) in the address bar. Press Enter to access the router’s login page.
  4. Log in to the Router: Enter the router’s administrative credentials to log in. If you haven’t changed the default username and password, you can find this information on the router’s label or in the router’s manual.
  5. Backup Router Settings (Optional): Before proceeding with the firmware update, consider backing up your router’s current settings. This ensures you can restore them in case anything goes wrong during the update process.
  6. Locate Firmware Update Section: In the router’s admin interface, navigate to the firmware update section. It may be under “Administration,” “Advanced,” or “Firmware Update.”
  7. Upload the Firmware: In the firmware update section, there should be an option to browse for the firmware file you downloaded earlier. Select the file and start the firmware update process. Do not interrupt the update process, as it could lead to problems with the router.
  8. Wait for the Router to Reboot: After the firmware update is complete, the router will automatically restart. This is normal during a firmware update.
  9. Verify the Update: Once the router has fully restarted, log back into the router’s admin interface and verify that the firmware has been updated to the latest version.
  10. Test the Connection: After updating the firmware, test your internet connection to ensure the blinking red LOS issue has been resolved.

If you do not find any firmware update options in your router’s admin interface or are unsure about the update process, it’s best to contact PLDT customer support for assistance. They can guide you through the firmware update process and provide further troubleshooting if needed.

Perform Factory Reset

Performing a factory reset is a potential troubleshooting step to fix the blinking red LOS (Link or Light on Signal) on your PLDT router. A factory reset will restore the router to its default settings, which can sometimes resolve software-related issues. However, please note that a factory reset will erase all custom settings and configurations, so you’ll need to set up your router again afterward. Here’s how you can perform a factory reset on your PLDT router:

Please follow these steps carefully:

  1. Locate the Reset Button: Look for the small reset button on your PLDT router. The location of the reset button may vary depending on the router’s model. It is typically a small hole labeled “RESET” or “RST.”
  2. Prepare a Pointed Object: To press the reset button, you’ll need a pointed object like a paperclip or a pin.
  3. Power Off the Router: Before performing the factory reset, make sure the router is powered on.
  4. Perform the Factory Reset: Insert the pointed object into the reset hole and hold down the reset button for about 10-15 seconds. You may need to use a bit of force. The router’s lights may blink during this process, which is normal.
  5. Release the Reset Button: After holding the reset button for the specified time, release it.
  6. Wait for the Router to Restart: The router will automatically reboot and restore its default settings. This process may take a few minutes.
  7. Set Up the Router: Once the router has fully restarted, you’ll need to set it up again as if it were new. This includes configuring your internet connection, Wi-Fi settings, and any other custom settings you had previously.
  8. Check the LOS Light: After completing the setup, observe the LOS light on your PLDT router. If the blinking red LOS issue was caused by a software-related problem, it should stabilize, and you should have a stable internet connection.
  9. Test the Connection: To ensure the issue is resolved, connect your devices to the internet and check if you have a stable connection.

If the factory reset does not resolve the issue or if you encounter any difficulties during the process, it’s essential to contact PLDT customer support for further assistance. They can help you troubleshoot the problem and provide additional guidance tailored to your router model and connection type.

What happens if I reset the router?

Performing a reset on your router will restore it to its factory default settings. This means that all the custom configurations you have made on the router, such as Wi-Fi settings, port forwarding rules, firewall settings, and other personalized configurations, will be erased. Here’s what happens when you reset the router:

  1. Default Settings: After the reset, the router will revert to the settings it had when it was first manufactured. This includes default network names (SSID) and passwords, as well as default login credentials to access the router’s administrative interface.
  2. Wi-Fi Network: If you had changed the Wi-Fi network name (SSID) and password to something of your choice, those changes will be lost, and the Wi-Fi network will return to the default settings. You’ll need to set up your Wi-Fi network again and create a new Wi-Fi password.
  3. Port Forwarding and Firewall Rules: If you had set up any port forwarding or firewall rules to allow specific network traffic to pass through the router, those rules will be cleared, and you’ll need to reconfigure them if necessary.
  4. DHCP Settings: Any changes you made to the DHCP (Dynamic Host Configuration Protocol) settings, such as DHCP range and lease time, will be reset to default values.
  5. Router Login Credentials: The administrative login credentials you had set up to access the router’s settings (username and password) will be reset to the default values specified in the router’s manual.
  6. Custom Firmware: If you had installed custom firmware on the router, performing a factory reset will revert the router back to its original firmware provided by the manufacturer.
  7. Internet Connection: A factory reset does not directly affect your internet connection setup or your ISP settings. However, if your internet issues were caused by incorrect settings on the router, those settings may be corrected after the reset.

Remember that a factory reset should be considered a last resort for troubleshooting connectivity issues or problems with your router. It erases all custom settings, which can be time-consuming to reconfigure. Before performing a reset, try other troubleshooting steps and consult your router’s manual or contact the manufacturer’s support or your Internet Service Provider (ISP) for assistance.

https://www.youtube.com/watch?v=zezPwsLDX7Y

Conclusion


A red blinking light on a PLDT router, specifically the LOS (Link or Light on Signal) indicator, indicates a loss of signal or connectivity issue with the internet service. While the exact causes may vary, common factors include faulty physical connections, internet service outages, or router-related problems.

To address the issue, users can start by checking and securing all physical connections, power cycle the router and modem, and verify for any service outages. If the problem persists, seeking technical assistance from PLDT customer support is recommended.

While a factory reset or firmware update might be considered in some cases, these actions should be approached with caution as they may reset the router’s settings or void warranties if not performed correctly.

FAQS

What does PLDT mean?

PLDT is an acronym for Philippine Long Distance and Telegraph Company. It was founded in 1928 by William G. Pery of the American Telephone and Telegraph Company (AT&T).

Why are they warning their customers?

PLDT is warning their customers because they have identified that hackers used a virus to attack their routers and intercept customer information such as credit card numbers, social security numbers, and internet browsing history without the knowledge of the user.

What should I do if my router has been infected?

PLDT advised all users to reset their home network to factory settings and then change the password on your router using strong credentials that can’t be easily guessed by anyone else. They also said that you should disconnect any device from your router until you verify if it’s working properly or not. You also need to make sure that you install all new updates for your router as soon as possible.