Include service LED in QUIET_MODE_LEDS option

IO.cpp

@@ -114,11 +114,15 @@ void CIO::process()
       m_watchdog = 0U;
     }
 
+#if defined(QUIET_MODE_LEDS)
+    LED_pin(HIGH);
+#else
     if (m_ledCount >= 24000U) {
       m_ledCount = 0U;
       m_ledValue = !m_ledValue;
       LED_pin(m_ledValue);
     }
+#endif
   } else {
     if (m_ledCount >= 240000U) {
       m_ledCount = 0U;