Why is the LED Not Lighting Up on RecDual Dongle?

If the LED indicators on your RecDual Dongle are not lighting up, this guide will help you identify and resolve the issue.

REC/STOP Button LED Not Lighting Up

Symptom: The REC LED remains off.

Cause: No TF card is inserted or TF card is not recognized.

Solutions:

1. Insert a TF Card

   • The REC LED only lights up when a TF card is inserted

   • Insert a formatted TF card into the slot

2. Check TF Card Insertion

   • Remove and reinsert the card

   • Ensure it clicks into place

   • Verify correct orientation

3. Format the TF Card

   • Format the card as exFAT on a computer

   • Do not use a smartphone to format

   • See How to Format TF Card for RecDual Dongle?

4. Try a Different Card

   • The card may be damaged or incompatible

   • Use a Class 10 or higher card

   • Try a known working card

SWITCH Button LED Not Lighting Up

Symptom: The SWITCH LED remains off.

Cause: No power or no video signal.

For HDMI Mode:

1. Connect External Power

   • HDMI mode requires power via Type-C PWR

   • Connect a power adapter

   • Verify power adapter is working

2. Check HDMI Connection

   • Ensure HDMI cable is connected to HDMI IN

   • Verify source device is outputting video

   • Try a different HDMI cable

3. Verify Source Device

   • Ensure source device is powered on

   • Check source device video output settings

For Type-C DP Mode:

1. Check Device Connection

   • Ensure Type-C cable is connected to DP IN

   • Verify device supports DisplayPort over Type-C

   • Try a different cable

2. Verify Device Compatibility

   • Not all Type-C ports support video output

   • Check device specifications for DP support

Both LEDs Not Lighting Up

Symptom: Neither LED lights up.

Causes and Solutions:

1. No Power

   • For HDMI: Connect power adapter to Type-C PWR

   • For Type-C DP: Ensure device is connected and supports DP

2. Defective Unit

   • If LEDs don’t light under any condition, contact support

LED Status Reference

REC LED:

• Off = No TF card

• Solid Green = Ready to record

• Blinking Green = Recording

• Solid Blue = Storage full

SWITCH LED:

• Off = No power or signal

• Solid Green = HDMI signal detected

• Blinking Green = HDMI selected, no signal

• Solid Blue = DP signal detected

• Blinking Blue = DP selected, no signal

Quick Checklist

Problem	Check
REC LED off	TF card inserted and formatted?
SWITCH LED off (HDMI)	Power connected? HDMI source active?
SWITCH LED off (DP)	Device connected? DP supported?
Both LEDs off	Any power source connected?

Related articles:

Understanding LED Indicators on RecDual Dongle TF Card Not Detected - What Should I Do? How to Troubleshoot No Signal Issues?

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