SL/ TL Wireless LCD - LIAN LI is a Leading Provider of PC Cases

Check how many LCD fans are installed and compare that number with what appears in L-Connect 3.
Open Device Manager and expand the USB section to confirm detection.
If Device Manager recognizes the fans but L-Connect 3 does not:
1. Ensure the affected fan group’s 4-pin PWM connector is connected to the included SATA adapter, EG-HUB01, or
2. EDGE Gold hub.
  Reinstall the latest version of L-Connect 3.
If the problem involves an unknown device, further hardware checks are required.

2. LCD Fan Shows Logo During Boot but Turns Black Afterwards

1. Verify the total number of LCD fans installed.
2. Check Device Manager → USB to confirm the correct number is detected.
3. If the detected count is incorrect:
  1. Replace the receiver module (the plastic clip at the end of the fan group) with a spare if available.
  2. Alternatively, swap the receiver with one from a functioning fan group.
4. If detection is restored after these steps, contact support and report the results.

3. LCD Fan Stays Black During Boot and Cannot Be Controlled

Confirm the number of LCD fans detected under Device Manager → USB.
The issue may be caused by either a faulty receiver module or fan.
To test the receiver module:
1. 1. Attach it to a working LCD fan.
  2. If the working fan stops functioning, replace the receiver module.
To test the fan:
1. Connect it using a known working receiver module.
2. If the fan still fails, it should be replaced.

4. Using NON-LIANLI USB HUB, AND LCD Screen(s) will sometimes Missing or Unresponsive, But Device Manager Detects Device

If user isn’t using LIAN LI’s hub, check whether the 3rd-party hub supports external power. TL/SL LCD needs USB power so unpowered hubs will cause instability.
If the hub is powered, but the user still has the issue with one of the groups. Plug that group’s usb directly to MB to verify.
If the group works normally when connected directly to MB, the 3rd party hub connected devices number needs to be decreased. Limit total connected USB devices per USB 2.0 port to 6. For example, if you have 2 sets of 3 LCD fans, connect one set to port 1 (direct to motherboard) and the other set to port 2 via hub.
If you have two fans in one group and three in another, and also USB from AIO, we recommend (this ensures balanced load across hub controller ports):
2 fans → Port 1
AIO or single USB → Port 2
3 fans → Port 3
We recommend using LIAN LI EDGE Hub (EG-01) or EDGE GOLD / EDGE Platinum PSUs.
If total USB devices exceed 9, keep motherboard USB 2.0 port count under 9. Move devices to rear I/O USB-A instead.
Connect wireless dongles to USB-A to avoid motherboard 2.0 port congestion. SL/TL LCDs should connect directly to motherboard USB 2.0 if possible.

5. TL/SL Wireless LCD Fans does not auto apply Screen Memory or Require Clicking Restart LCD After Boot

Check if power is supplied from the included SATA-PWM splitter or PWM 12V Hub (such as Edge Hub or Edge Gold’s Hub).
Check if updating to L-Connect 3’s latest version improves behavior.
Turn off fast Startup, by going to control panel-power option-choose what the power button do-change settings-disable fast startup-save setting
If not, likely too many USB devices are connected to one hub. Spread USB devices across multiple USB 2.0 or rear USB-A ports.
Each USB 2.0 9-pin header on motherboard should not exceed 9 USB devices total (including hubs + direct connections).
LIAN LI USB Hub = max 6 devices
Other powered hubs = max 4 devices
EDGE Hub’s first port (Port 1) is direct pass through from the motherboard → best for SL/TL Wireless LCD or L-Wireless Controller (not recommended for AIO).
Port 2 is the first branch off the hub’s internal controller → avoid using it for 3x fan setups; instead, place 3x fans on Port 3 or 4.

6. TL/SL Wireless LCD Fans Lose Settings After Sleep/Wake

Check if updating to L-Connect 3’s latest version improves behavior.
If the issue persists, likely too many USB devices are connected to one hub. Spread USB devices across multiple USB 2.0 or rear USB-A ports.
A. Each USB 2.0 9-pin header on motherboard should not exceed 9 USB devices total (including hubs + direct connections).
i. LIAN LI USB Hub = max 6 devices
ii. Other powered hubs = max 4 devices
B. EDGE Hub’s first port (Port 1) is direct pass through from the motherboard → best for SL/TL Wireless LCD or L-Wireless Controller (not recommended for AIO).
C. Port 2 is the first branch off the hub’s internal controller → avoid using it for 3x fan setups; instead, place 3x fans on Port 3 or 4.

7. TL/SL Wireless LCD Fans Lose Content Orientation After Sleep/Wake

1. Check if updating to L-Connect 3’s latest version improves behavior.
2. Update TL Wireless LCD/SL Wireless LCD’s FW to their respective versions
  A. TL Wireless LCD
  B. SL Wireless LCD

8. Fan Lighting Occasionally Resets to Rainbow on Boot or at Random

Check if power is supplied from the included SATA-PWM splitter or PWM 12V Hub (such as Edge Hub or Edge Gold’s Hub).
Check if updating to L-Connect 3’s latest version improves behavior. It enables auto re-application of lighting settings.

9. Wireless Sync List Shows “Unknown Device” and Won’t Revert

Confirm software version is on the latest version.
Follow the steps:
1. With PC on, unplug the power/receiver module from the fan group with issue.
2. Find LIAN LI icon on Windows bottom right corner, right clicks to shutdown service
3. Wait 10 seconds.
4. Unplug the L-Wireless controller.
5. Plug the power/receiver module back to the fan group.
6. Plug the L-Wireless controller back.
7. Right click LIAN LI icon again to restart service.

10. If Unknown Device still exist: Unknown Device Debug.pdf

Unknown Device Debug.pdf

This likely means the one of the fan’s output port is faulty.
Remove the third fan (the fan the receiver is attached to is counted as first)
Shutdown and restart L-Connect service by clicking the icon on the bottom right corner. But before doing so, make sure the Lock Bound Device button is not toggled.
If “UnknownDevice still exists
1. Then the first fan’s output port is faulty, move it to the third position
If “UnknownDevice” disappears
1. Then the second fan’s output port is faulty, move it to the third position
Restart L-Connect 3 service
If swapping doesn’t fix the issue, then contact us via “form” with this result to replace the entire fan group.

11. The fan is only showing partial lighting, and also causing the fan connect after to lose lighting

Check if power is supplied from included SATA-PWM splitter or PWM 12V Hub (such as Edge Hub or Edge Gold’s Hub).
Swap the receiver between different fan groups to check if it’s the receiver causing the issue.
If the issue persists, then contact us via “form” with this result to replace that fan.

12. Devices Missing from Wireless Sync Setup List (Disappeared from UI)

Confirm L-Connect version is on the latest version.
Check if Wireless fan’s power is supplied from included SATA-PWM splitter or PWM 12V Hub (such as Edge Hub or Edge Gold’s Hub).
Close the L-Connect 3 service, wait 10 sec, unplug the wireless dongle, and plug it into the rear I/O USB-A (rear USB port recommended). Restart the service afterward.
If the devices still don’t appear, then contact us via “form” with this result.

13. One Wireless Fan Group Loses Lighting After Boot (Lighting Doesn’t Apply)

In Wireless Sync Setup, click the lightbulb icon to check for yellow light response.
If the yellow light shows: unplug and replug the receiver from the fan to reset communication.
If there’s no yellow light: unplug and replug the receiver’s 12V power source.
If issue persists, then contact us via “form” with this result.

14. Wireless Device Lighting Turns Abnormal After Boot or During Idle

Check that the power source is sufficient—confirm SATA is connected or new receiver is properly installed as per the manual.
Make sure to update L-Connect 3 to the latest version.
If the problem is reoccurring, then contact us via “form” with this result.

15. Wireless LCD Fan Noise

Distinguish whether the noise comes from the bearing or the fan blades scraping the frame.

Uninstall the fan that’s making noise and lay it flat outside for 10 minutes before putting it back. If the issue persists, then contact us for replacement.

If it’s fan’s frame scraping, ask the user to loosen the mounting screws and try reapplying with even pressure for screws, if still not solved, then contact us for replacement.

16. One UNI FAN Wireless Group Has Different Fan Speeds

Unbind and rebind the affected fan group in the L-Wireless binding page.
Disconnect and reconnect the L-Wireless controller.