PLDT Router LOS Blinking Red: A Complete Guide to Fixing It

by Jack Prosser
PLDT Router LOS Blinking Red

It’s always frustrating when you’re trying to stream your favorite show, meet a work deadline, or just surf the Internet and you suddenly encounter connection problems. Seeing the LOS (Loss of Signal) light blinking red on your PLDT Router can definitely ruin your day. But don’t panic! This guide could just be your lifesaver!

What is LOS Red Light on Modem?

To begin, let’s try to understand what’s happening. The term “LOS” stands for Loss of Signal. When LOS light is blinking red on your router, it simply means that your router is not able to establish a connection with your Internet Service Provider (ISP); in this case, PLDT. The likely culprits could be an issue with the fiber cables such as physical damage or network synchronization failure. If you own a Huawei router, we’ve a guide specifically for LOS Red Lighting Blinking on Huawei – to fix it in few easy steps.

6 Solutions to fix PLDT Router LOS Blinking Red

When the dreaded blinking red LOS light appears on your PLDT router, it’s time to switch into troubleshooting mode. In the next section of our guide, ‘6 Solutions to Fix PLDT Router LOS Blinking Red’, we’ll walk you through straightforward and effective remedies to resolve this issue. These actionable steps are designed to get your internet connection back on track.

Solution 1: Restart Your Router

PLDT Router LOS Blinking Red: A Complete Guide to Fixing ItRestart Your PLDT Router

The first and simplest step to try is restarting your router. It may seem like a basic solution, but it often works wonders. By restarting your router, you allow it to reboot, reestablish connections, and sync with the ISP. Here’s how you can do it:

1. Power off your router by unplugging its power cord from the electrical outlet.
2. Wait for about 30 seconds to ensure all components have had a chance to reset.
3. Plug the power cord back into the outlet and let the router boot up.
4. Wait for a few minutes and check if the LOS light has stopped blinking red.

Solution 2: Check Physical Connections

Check Physical Connections of PLTD Router

Sometimes, the issue lies with the physical connections of your router. Loose or damaged cables can disrupt the signal flow and result in the blinking red LOS light. Follow these steps to ensure your connections are secure:

1. Start by unplugging the Ethernet cable that connects your modem to the router.
2. Inspect the cable for any physical damage, such as cuts or fraying.
3. Reconnect the Ethernet cable firmly to both the modem and the WAN port of your router.
4. If you have additional cables connecting devices to the router, ensure they are properly connected as well.
5. Power on your router and check if the LOS light is still blinking red.

Solution 3: Try Resetting Your Router

If restarting and checking physical connections don’t yield positive results, you may need to reset your router. Please note that resetting your router will erase all settings. Therefore, be prepared to reconfigure your router after performing the reset. Here’s how you can do it:

1. Locate the reset button on your router. It’s usually a small pinhole at the back or underside of the device.
2. Insert a thin object, such as a paperclip or pin, into the reset button and hold it for about 10 to 15 seconds.
3. Release the reset button and wait for your router to restart.
4. Follow the manufacturer’s instructions to set up your router again.

Solution 4: Verify PLDT Fiber Cable Connections

For PLDT FIBR routers, the blinking red LOS light may indicate an issue with the fiber cables. These cables are responsible for carrying data signals from the ISP to your router.

Ensure that the fiber cables are securely connected at both ends – one to the outdoor termination box (ONT) and the other to your router.

If you notice any damage or loose connections, contact PLDT for assistance or request a technician visit to address the fiber cable issue.

You can’t fix Fiber cable by yourself – special equipment is needed to fix it.

Solution 5: Check for Planned Network Maintenance

In some cases, the blinking red LOS light on your PLDT router may indicate planned network maintenance or an outage in your area. Before diving into extensive troubleshooting, it’s worth checking if PLDT has announced any scheduled maintenance or if other users in your neighborhood are experiencing similar issues.

You can check for service advisories on the PLDT website or social media channels. If there is a planned maintenance or outage, it’s best to wait until the scheduled time has passed or until PLDT resolves the issue.

Solution 6: Contact PLDT Customer Service

If the previous solutions haven’t resolved the blinking red LOS light on your PLDT router, it may be time to reach out to PLDT’s customer service.

Their support team has the knowledge and expertise to guide you through more advanced troubleshooting steps or schedule a technician visit if needed. They can assess the issue remotely and provide personalized assistance based on your specific situation.

PLDT Router LOS Blinking Red and PLDT FIBR Red Blinking LOS

Users of both regular PLDT routers and PLDT FIBR routers may encounter the blinking red LOS light issue. While there may be slight differences between the two router models, the underlying connection and synchronization issues remain the same. The solutions mentioned earlier can be applied to address the blinking red LOS light on both router types.


A flashing red LOS indicator on your PLDT router, whether a regular model or a Fibr one, suggests a sync issue between your router and ISP. Always start diagnosing by restarting and resetting your router and checking your physical connections. If the red LOS light persists, it’s always best to get in touch with customer service.

Now, you are equipped with the knowledge to tackle the LOS internet connection problem on your PLDT router! Remember, when in doubt, a professional technician is always there to help!

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