Index: firmware/App/Modes/ModeSolo.c
===================================================================
diff -u -ra7bf3ca23ea37a61000379facae628a31b3ecc59 -r8f5feed92f41a476d5656038bcdfe884e17bd593
--- firmware/App/Modes/ModeSolo.c	(.../ModeSolo.c)	(revision a7bf3ca23ea37a61000379facae628a31b3ecc59)
+++ firmware/App/Modes/ModeSolo.c	(.../ModeSolo.c)	(revision 8f5feed92f41a476d5656038bcdfe884e17bd593)
@@ -15,9 +15,10 @@
 *
 ***************************************************************************/
 
-#include "OperationModes.h"
-#include "ModeSolo.h"
 #include "CPLD.h"
+#include "ModeSolo.h"
+#include "OperationModes.h"
+#include "SystemComm.h"
 
 /**
  *  @addtogroup DGSoloStandbyMode
@@ -32,6 +33,8 @@
 
 // ********** private function prototypes **********
 
+static DG_SOLO_STANDBY_STATE_T handleIdleDGSoloStandbyState( void );
+
 /*********************************************************************//**
  * @brief
  * The initSoloMode function initializes the Standby-Solo Mode module.
@@ -72,8 +75,13 @@
     switch ( soloState )
     {
         case DG_SOLO_STANDBY_STATE_START:
+            soloState = DG_SOLO_IDLE_STATE;
             break;
 
+        case DG_SOLO_IDLE_STATE:
+            soloState = handleIdleDGSoloStandbyState();
+            break;
+
         default:
             // TODO - s/w fault
             soloState = DG_SOLO_STANDBY_STATE_START;
@@ -85,6 +93,28 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleIdleDGSoloStandbyState function handles the idle state of DG \n
+ * standby-solo mode.
+ * @details
+ * Inputs : none
+ * Outputs : none
+ * @return the next state of standby-solo mode.
+ *************************************************************************/
+static DG_SOLO_STANDBY_STATE_T handleIdleDGSoloStandbyState( void )
+{
+    DG_SOLO_STANDBY_STATE_T result = DG_SOLO_IDLE_STATE;
+
+    // if HD is on, transition to DG standby mode
+    if ( TRUE == isHDCommunicating() )
+    {
+        requestNewOperationMode( DG_MODE_STAN );
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The getCurrentSoloState function returns the current state of the \n
  * standby-solo mode.
  * @details