diff --git a/README.md b/README.md
index a5f3465..b9520e6 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ SELECT+Y - Dump hardware frame output to `/3ds/open_agb_firm/screenshots/YYYY_MM
 * The file name is the current date and time from your real-time clock.
 * If the screen output freezes, press HOME to fix it. This is a hard to track down bug that will be fixed.
 
+START+Y - Toggle power LED on/off.
+
 X+UP/DOWN - Adjust screen brightness up or down by `backlightSteps` units.
 
 X+LEFT - Turn off LCD backlight.
diff --git a/source/arm11/open_agb_firm.c b/source/arm11/open_agb_firm.c
index 05baff8..1c9aae2 100644
--- a/source/arm11/open_agb_firm.c
+++ b/source/arm11/open_agb_firm.c
@@ -41,7 +41,7 @@
 
 
 static KHandle g_frameReadyEvent = 0;
-
+static PwrLedPattern g_lastPowerLEDPattern = MCU_PWR_LED_AUTO;
 
 
 static u32 fixRomPadding(const u32 romFileSize)
@@ -122,6 +122,21 @@ void changeBacklight(s16 amount)
 	GFX_setLcdLuminance(newVal);
 }
 
+void togglePowerLED()
+{
+	PwrLedPattern currentPattern = MCU_getPowerLedPattern();
+	if (currentPattern == MCU_PWR_LED_OFF)
+	{
+		// Restore last know pattern.
+		MCU_setPowerLedPattern(g_lastPowerLEDPattern);
+	}
+	else
+	{
+		MCU_setPowerLedPattern(MCU_PWR_LED_OFF);
+	}
+	g_lastPowerLEDPattern = currentPattern;
+}
+
 static void updateBacklight(void)
 {
 	// Check for special button combos.
@@ -129,6 +144,10 @@ static void updateBacklight(void)
 	static bool backlightOn = true;
 	if(hidKeysDown() && kHeld)
 	{
+		// Toggle power LED.
+		if (kHeld == (KEY_Y | KEY_START))
+			togglePowerLED();
+
 		// Adjust LCD brightness up.
 		const s16 steps = g_oafConfig.backlightSteps;
 		if(kHeld == (KEY_X | KEY_DUP))