Update Power.cpp (#2979)

src/Power.cpp

@@ -435,7 +435,7 @@ void Power::shutdown()
     ledOff(PIN_LED2);
 #endif
 #ifdef PIN_LED3
-    ledOff(PIN_LED2);
+    ledOff(PIN_LED3);
 #endif
     doDeepSleep(DELAY_FOREVER, false);
 #endif
@@ -897,4 +897,4 @@ bool Power::axpChipInit()
 #else
     return false;
 #endif
-}
+}