# Troubleshooting

This section lists common issues you may encounter while using the SLWF-09, along with their possible causes and solutions.

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## **6.1 Power Issues**

<div class="_tableContainer_1rjym_1" id="bkmrk-problem-possible-cau"><div class="_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse" tabindex="-1"><table class="w-fit min-w-(--thread-content-width)" data-end="898" data-start="335"><thead data-end="374" data-start="335"><tr data-end="374" data-start="335"><th data-col-size="sm" data-end="345" data-start="335">Problem</th><th data-col-size="md" data-end="362" data-start="345">Possible Cause</th><th data-col-size="lg" data-end="374" data-start="362">Solution</th></tr></thead><tbody data-end="898" data-start="415"><tr data-end="662" data-start="415"><td data-col-size="sm" data-end="445" data-start="415">No power LED when connected</td><td data-col-size="md" data-end="536" data-start="445">\- Incorrect power supply voltage  
\- Loose or reversed wiring  
\- Faulty power adapter

\- Incorrect WLED relay settings

</td><td data-col-size="lg" data-end="662" data-start="536">\- Verify voltage matches LED strip (5V, 12V)  
\- Check all power connections  
\- Try a different power source

\- "Relay GPIO" setting should be **GPIO33**

</td></tr><tr data-end="898" data-start="663"><td data-col-size="sm" data-end="704" data-start="663">Device powers on but LEDs do not light</td><td data-col-size="md" data-end="786" data-start="704">\- Incorrect LED wiring  
\- Wrong LED type in WLED  
\- Data wire not connected

\- LED relay is not configured

</td><td data-col-size="lg" data-end="898" data-start="786">\- Verify data and ground connections  
\- Match LED type in WLED settings  
\- Check continuity of data wire

\- Configure LED relay in WLED to GPIO33

</td></tr></tbody></table>

</div></div>---

## **6.2 Network Connection Problems**

<div class="_tableContainer_1rjym_1" id="bkmrk-problem-possible-cau-1"><div class="_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse" tabindex="-1"><table class="w-fit min-w-(--thread-content-width)" data-end="1557" data-start="945"><thead data-end="984" data-start="945"><tr data-end="984" data-start="945"><th data-col-size="sm" data-end="955" data-start="945">Problem</th><th data-col-size="md" data-end="972" data-start="955">Possible Cause</th><th data-col-size="md" data-end="984" data-start="972">Solution</th></tr></thead><tbody data-end="1557" data-start="1025"><tr data-end="1211" data-start="1025"><td data-col-size="sm" data-end="1067" data-start="1025">Cannot find WLED Wi-Fi AP on first boot</td><td data-col-size="md" data-end="1118" data-start="1067">- Device already connected to a previous network</td><td data-col-size="md" data-end="1211" data-start="1118">- Reset Wi-Fi settings by holding **BOOT** button for 5+ seconds until LED blinks rapidly</td></tr><tr data-end="1365" data-start="1212"><td data-col-size="sm" data-end="1243" data-start="1212">Cannot connect to home Wi-Fi</td><td data-col-size="md" data-end="1296" data-start="1243">- Wrong SSID/password  
- Unsupported 5 GHz Wi-Fi</td><td data-col-size="md" data-end="1365" data-start="1296">- Double-check credentials  
- Ensure router has 2.4 GHz enabled</td></tr><tr data-end="1557" data-start="1366"><td data-col-size="sm" data-end="1403" data-start="1366">Ethernet not working (with add-on)</td><td data-col-size="md" data-end="1458" data-start="1403">- Module not fully inserted  
- No DHCP from router</td><td data-col-size="md" data-end="1557" data-start="1458">- Reseat Ethernet module  
- Try a different cable/port  
- Check if IP is assigned in router</td></tr></tbody></table>

</div></div>---

## **6.3 LED Output Issues**

<div class="_tableContainer_1rjym_1" id="bkmrk-problem-possible-cau-2"><div class="_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse" tabindex="-1"><table class="w-fit min-w-(--thread-content-width)" data-end="2039" data-start="1594"><thead data-end="1633" data-start="1594"><tr data-end="1633" data-start="1594"><th data-col-size="sm" data-end="1604" data-start="1594">Problem</th><th data-col-size="md" data-end="1621" data-start="1604">Possible Cause</th><th data-col-size="md" data-end="1633" data-start="1621">Solution</th></tr></thead><tbody data-end="2039" data-start="1674"><tr data-end="1883" data-start="1674"><td data-col-size="sm" data-end="1710" data-start="1674">LEDs flicker or show wrong colors</td><td data-col-size="md" data-end="1787" data-start="1710">- Voltage drop on long runs  
- Poor grounding  
- Incorrect LED voltage</td><td data-col-size="md" data-end="1883" data-start="1787">- Use power injection  
- Ensure common ground  
- Match LED strip voltage to power supply</td></tr><tr data-end="2039" data-start="1884"><td data-col-size="sm" data-end="1915" data-start="1884">Only first few LEDs light up</td><td data-col-size="md" data-end="1968" data-start="1915">- Power not sufficient  
- WLED LED count too low</td><td data-col-size="md" data-end="2039" data-start="1968">- Increase power supply capacity  
- Set correct LED count in WLED</td></tr></tbody></table>

</div></div>---

## **6.4 Add-on Module Problems**

<div class="_tableContainer_1rjym_1" id="bkmrk-problem-possible-cau-3"><div class="_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse" tabindex="-1"><table class="w-fit min-w-(--thread-content-width)" data-end="2465" data-start="2081"><thead data-end="2120" data-start="2081"><tr data-end="2120" data-start="2081"><th data-col-size="sm" data-end="2091" data-start="2081">Problem</th><th data-col-size="md" data-end="2108" data-start="2091">Possible Cause</th><th data-col-size="md" data-end="2120" data-start="2108">Solution</th></tr></thead><tbody data-end="2465" data-start="2161"><tr data-end="2286" data-start="2161"><td data-col-size="sm" data-end="2187" data-start="2161">PoE not powering device</td><td data-col-size="md" data-end="2243" data-start="2187">- Non-PoE switch/injector  
- Incorrect PoE standard</td><td data-col-size="md" data-end="2286" data-start="2243">- Use IEEE 802.3af compliant PoE source</td></tr><tr data-end="2465" data-start="2287"><td data-col-size="sm" data-end="2313" data-start="2287">Microphone not detected</td><td data-col-size="md" data-end="2388" data-start="2313">- Module not inserted fully  
- Sound reactive mode not enabled in WLED</td><td data-col-size="md" data-end="2465" data-start="2388">- Reinsert module correctly  
- Enable "Sound Reactive" in WLED settings</td></tr></tbody></table>

</div></div>---

## **6.5 Firmware &amp; Reset**

<div class="_tableContainer_1rjym_1" id="bkmrk-problem-possible-cau-4"><div class="_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse" tabindex="-1"><table class="w-fit min-w-(--thread-content-width)" data-end="2863" data-start="2501"><thead data-end="2540" data-start="2501"><tr data-end="2540" data-start="2501"><th data-col-size="sm" data-end="2511" data-start="2501">Problem</th><th data-col-size="sm" data-end="2528" data-start="2511">Possible Cause</th><th data-col-size="md" data-end="2540" data-start="2528">Solution</th></tr></thead><tbody data-end="2863" data-start="2581"><tr data-end="2729" data-start="2581"><td data-col-size="sm" data-end="2610" data-start="2581">WLED interface not loading</td><td data-col-size="sm" data-end="2650" data-start="2610">- Firmware corrupted  
- IP conflict</td><td data-col-size="md" data-end="2729" data-start="2650">- Reflash firmware via [Web Flasher](https://smlight.tech/flasher/#SLWF-09)</td></tr><tr data-end="2863" data-start="2730"><td data-col-size="sm" data-end="2765" data-start="2730">Device unresponsive after update</td><td data-col-size="sm" data-end="2794" data-start="2765">- Incorrect firmware build</td><td data-col-size="md" data-end="2863" data-start="2794">- Flash with correct SLWF-09 firmware using USB-C and web flasher</td></tr></tbody></table>

</div></div>---

## **6.6 Support**

If problems persist:

1. Visit the documentation at https://smlight.tech/support/manuals/public/books/slwf-09
2. Use the [Web Flasher](https://smlight.tech/flasher/#SLWF-09) to reinstall firmware.
3. Contact **SMLIGHT Support** with your purchase details and a description of the issue.