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tl-sg108 8 port unmanaged switch - LED's

tl-sg108 8 port unmanaged switch - LED's

tl-sg108 8 port unmanaged switch - LED's
tl-sg108 8 port unmanaged switch - LED's
2025-01-18 17:02:33 - last edited 2025-02-21 07:53:30
Model: TL-SG108  
Hardware Version:
Firmware Version: V5

Hi all, I picked up a tl-sg108 8 port unmanaged switch second hand, and I have a question about it please? I have it connected directly, to my fibre router, all seems to be working just fine, except for one oddity.....

 

There is a single green LED, at each of the 8 ports, if an device is plugged into a port, the LED flashes, as I would expect, and I have 4 such devices plugged in. However, the router to switch cable, irrespective of which port I plug it into, the LED does not light up at all, no flashing, nothing. Is this normal, or does it suggest a problem please?

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1 Accepted Solution
Re:tl-sg108 8 port unmanaged switch - LED's-Solution
2025-01-19 22:47:01 - last edited 2025-02-21 07:53:30

  @M1BYT 

 

From switch installation guide:

Q2. The Link/Act LED is not lit when a device is connected to the corresponding port.

It is recommended that you check the following items:
A1: Make sure that the cable connectors are firmly plugged into the
switch and the device.
A2: Make sure the connected device is turned on and works normally.
A3: The cable must be less than 100 meters long (328 feet).

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Re:tl-sg108 8 port unmanaged switch - LED's-Solution
2025-01-19 22:47:01 - last edited 2025-02-21 07:53:30

  @M1BYT 

 

From switch installation guide:

Q2. The Link/Act LED is not lit when a device is connected to the corresponding port.

It is recommended that you check the following items:
A1: Make sure that the cable connectors are firmly plugged into the
switch and the device.
A2: Make sure the connected device is turned on and works normally.
A3: The cable must be less than 100 meters long (328 feet).

If this was helpful click on the arrow pointing upward to make it blue. If this solves your issue, click the star to make it blue and mark the post as a "Recommended Solution".
Recommended Solution
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Re:tl-sg108 8 port unmanaged switch - LED's
2025-01-20 10:19:09
That didn't really answer my question... Should the Link/Act LED, light up, at the port where the cable from the main router is plugged in? The LED's for every port, do light up, for all of my devices. The cable from the main router, fails to light the LED, no matter which port it is plugged into. I am trying to decide whether this is a fault, or not. Other than that, it seems to perform at full speed, as near as I can tell.
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Re:tl-sg108 8 port unmanaged switch - LED's
2025-01-20 13:16:25

  @M1BYT 

 

According to description from the user guide, the port should work as any other port where a device is connected (light up).

But as you said - there's no problem when using the switch and you don't have to worry about that.

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Re:tl-sg108 8 port unmanaged switch - LED's
2025-03-18 12:16:20

  @M1BYT For those considering an upgrade, sometimes choosing the right adapter feels like a but with these specs, the decision just got a lot easier! 🔥 Looking forward to seeing real-world performance and user feedback.  

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Re:tl-sg108 8 port unmanaged switch - LED's
2025-03-21 08:02:49

  @M1BYT 

If everything is working fine and devices have internet access, it’s likely just a minor LED issue or a cosmetic fault with that specific port’s indicator, not a real connection problem.

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Re:tl-sg108 8 port unmanaged switch - LED's
2025-04-19 16:20:57

  @M1BYT Deep in the menu is the option to turn off the LED. Can't find it today but remember it from set up, tempting but confusing during fault finding.  

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Re:tl-sg108 8 port unmanaged switch - LED's
2025-04-19 16:48:11 - last edited 2025-04-20 18:52:17

  @Kevin53 

 

Good catch - check here:

 

 

but that is for easysmart TL-SG108E switch. Actually the OP has an unmanaged TL-SG108.

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Re:tl-sg108 8 port unmanaged switch - LED's
Yesterday

  @M1BYT 

 

That sounds normal for the TP-Link TL-SG108, especially since it’s an unmanaged switch with simple status LEDs. The LED indicators show link activity only when both connected ports actively negotiate a connection at the same speed and duplex. If your devices on the switch are working fine and have network access through the router, then the link is definitely active — the LED might just not light up because of how that particular port-to-port connection is being detected. Try swapping the Ethernet cable or using a different port to confirm it’s not a physical connection issue. If everything still works properly, there’s likely no fault, just a quirk in how the switch’s LED behavior interacts with your router’s port.

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