Quick answer: Most fibre problems can be fixed at home. Run a speed test, restart your router (switch it off for a minute, then on again), check the cables and the lights on your fibre box, and plug in with an Ethernet cable to rule out Wi-Fi. If it’s still slow or down, contact your ISP: they handle faults and log any line problem with FibreGeeks. Don’t try to repair a damaged fibre cable yourself.
Fibre Internet Troubleshooting: Common Problems and Fixes
Having fibre internet that works reliably has become a non negotiable part of modern life. Whether it’s streaming your favourite shows, attending online meetings or connecting smart devices, we rely on our internet to work smoothly. But what happens when it doesn’t? This guide will go through common fibre internet problems and provide solutions to get you back online.
Fibre Internet Problems
Slow Internet Speeds
Slow internet speeds can be annoying especially if you’re paying for a premium plan. This is often caused by network congestion, old equipment or bandwidth limitations due to multiple devices connected. Learn more about improving your connection by understanding the difference between fibre, LTE, and ADSL.
Intermittent Connectivity
Intermittent drops in your connection can be a major pain. These outages can be caused by signal interference, wrong router placement or temporary
ISP service disruption.
No Internet Connection
Complete loss of connection is one of the most scary problems. It can be caused by broken fibre cable,
incorrect fibre installation, ISP downtime or wrong router settings.
Fibre Internet Problems Causes
Router or Modem Issues
Your router or modem is the gateway to fibre internet to your devices. Old firmware, overheating or hardware faults can cause connectivity issues. Learn how to keep your connection stable by following our
installation guide.
ISP Issues
Sometimes the problem is outside your home. Your ISP might be experiencing technical issues, scheduled maintenance or overload during peak hours. Check the
network status for more information.
Physical Damage to Cables or Hardware
Fibre optic cables are fragile and can get damaged from construction work, accidental tampering or even natural wear and tear and disrupt your connection. If you suspect damage, don’t touch the fibre. Report it to your ISP, who logs it with FibreGeeks.
Slow Internet Speeds Troubleshooting
Step 1: Check Your Speed
Start by running a speed test using tools like Speedtest.net to compare your current speed with the promised speed in your ISP plan. For more information, see
uncapped vs unshaped explained.
Step 2: Restart Your Router or Modem
A simple reboot can fix many temporary issues. Turn off your router or modem, wait for 1 minute and turn it back on.
Step 3: Disconnect Unused Devices
Too many devices on the same network can eat up your bandwidth. Disconnect devices that are not in use.
Step 4: Call Your ISP
If the problem persists after troubleshooting, contact your ISP to check if there’s an issue on their end or if you need a plan upgrade. Refer to our
fibre guide to learn more about upgrading.
Intermittent Connectivity Troubleshooting
Find the Pattern of Disconnections
Start by noting when and how often your internet connection drops. Is it during certain times of the day? Patterns can help you identify the issue, like network congestion during peak hours.
Check Router Firmware
Firmware updates often fixes bugs and improves performance. Log in to your router’s settings and check for updates. Follow the manufacturer’s instructions to install them.
Move the Router for Better Coverage
Placement is key for strong signal. Make sure your router is in a central, elevated position, away from walls and metal objects that can block the signal.
Check for Interference
Microwaves, cordless phones and baby monitors can cause interference. Move your router away from these devices and try switching to a less busy Wi-Fi channel.
No Internet Connection
Check All Cables and Connections
Check all cables are plugged in. A loose or disconnected fibre line can break your connection. Check the cables for any visible damage. For more help, visit our
installation guide.
Check for Physical Damage to the Fibre Line
Fibre optic cables are fragile and can be damaged. If you see any cuts or tears, don’t try to repair it yourself; contact your ISP, who logs it with FibreGeeks.
Check with Your ISP
Your ISP might be down or doing maintenance. Visit their website or call their support to check the service status in your area. For more answers, see our
FAQs page.
Reset or Reconfigure Router Settings
If none of the above works, try doing a factory reset on your router. Refer to the user manual to reset the device to its default settings and set it up again.
Advanced Troubleshooting
Use ISP Provided Diagnostic Tools
Many ISPs have diagnostic tools or apps to check your connection. These tools can detect issues and give you specific solutions.
Understand Router Lights and Codes
Modern routers have lights that indicate connection status. Learn what each light or code means to better understand the problem. For example, a red light means service disruption.
Test with Other Devices or Cables
Eliminate device issues by testing with another computer or smartphone. Swapping cables will rule out hardware fault.
When to Call a Technician
When Self Troubleshooting Fails
Sometimes even after trying all the above steps the issue persists. If you notice recurring issues or suspect fibre line damage, it’s time to call in a professional.
Why Professional Inspection and Repair
Professional technicians have the tools and knowledge to diagnose accurately. They can find hidden issues like cable damage, signal loss or faulty hardware and fix them quickly.
How to Choose a Fibre Technician
Don’t let a third-party technician work on the fibre line or ONT. Log the fault with your ISP, who’ll arrange a FibreGeeks technician if needed.
Fibre Internet Maintenance
Update Router Firmware
Keep your router firmware up to date so it works optimally and is secure. Set reminders to check for updates regularly.
Keep Cables Tidy
Disorganised or exposed cables are more likely to get damaged. Use cable management to protect your fibre line from accidental pulls or wear and tear.
Report Problems Early
If you suspect a problem, run a speed test and contact your ISP. Learn more about this in our
value-added services page.
Fibre Internet Troubleshooting FAQs
Why is my Fibre Internet slow at night?
Peak hour congestion when everyone is online at the same time. Upgrading your plan or switching to a less congested ISP might help. For detailed advice, check our
uncapped Wi-Fi guide.
Can weather affect Fibre Internet?
Unlike satellite or wireless, fibre is not affected by weather. But extreme weather can damage external infrastructure and cause disruptions.
How do I know if my router is faulty?
Signs of a faulty router are frequent disconnections, unresponsive settings or overheating. Try testing with another router to confirm.
What does the red light on my Fibre box mean?
A red light means no signal is being received. Check your connections and call your ISP for help.
How long does it take to fix a Fibre line?
Depends on the extent of the damage. Minor issues can take a few hours, major repairs can take a day or more.
Fibre internet has changed the way we connect to the world but like any technology, it’s not without its flaws. From slow speeds to complete outages, knowing the common issues and solutions is key to a smooth online experience. With these troubleshooting tips, most problems can be fixed without a technician.
If problems persist, log a fault with your ISP. They’ll escalate line or ONT faults to FibreGeeks. For anything else,
contact FibreGeeks during office hours. We build and maintain open-access fibre in estates and business parks across the Western Cape.
Remember, prevention is better than cure. Regular maintenance, keep your router updated and cables secured will save you time and hassle in the long run. FibreGeeks got your back.
