diff --git a/Firmware/Configuration.h b/Firmware/Configuration.h
index 1ede18c03..75a9ad5cc 100644
--- a/Firmware/Configuration.h
+++ b/Firmware/Configuration.h
@@ -489,11 +489,6 @@ your extruder heater takes 2 minutes to hit the target on heating.
 // Increase the FAN pwm frequency. Removes the PWM noise but increases heating in the FET/Arduino
 //#define FAST_PWM_FAN
 
-// Temperature status LEDs that display the hotend and bet temperature.
-// If all hotends and bed temperature and temperature setpoint are < 54C then the BLUE led is on.
-// Otherwise the RED led is on. There is 1C hysteresis.
-//#define TEMP_STAT_LEDS
-
 // Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
 // which is not ass annoying as with the hardware PWM. On the other hand, if this frequency
 // is too low, you should also increment SOFT_PWM_SCALE.
diff --git a/Firmware/ConfigurationStore.cpp b/Firmware/ConfigurationStore.cpp
index adccb3999..c045284f5 100644
--- a/Firmware/ConfigurationStore.cpp
+++ b/Firmware/ConfigurationStore.cpp
@@ -260,10 +260,6 @@ bool Config_RetrieveSettings()
     {
 
         EEPROM_readData(reinterpret_cast<uint8_t*>(EEPROM_M500_base), reinterpret_cast<uint8_t*>(&cs), sizeof(cs), "cs");
-
-        
-		if (cs.max_jerk[X_AXIS] > DEFAULT_XJERK) cs.max_jerk[X_AXIS] = DEFAULT_XJERK;
-		if (cs.max_jerk[Y_AXIS] > DEFAULT_YJERK) cs.max_jerk[Y_AXIS] = DEFAULT_YJERK;
         calculate_extruder_multipliers();
 
 		//if max_feedrate_silent and max_acceleration_units_per_sq_second_silent were never stored to eeprom, use default values:
diff --git a/Firmware/MarlinSerial.cpp b/Firmware/MarlinSerial.cpp
index 5f1c5ce33..e09ddac32 100644
--- a/Firmware/MarlinSerial.cpp
+++ b/Firmware/MarlinSerial.cpp
@@ -30,7 +30,7 @@ uint8_t selectedSerialPort = 0;
 // this is so I can support Attiny series and any other chip without a UART
 #if defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H)
 
-#if UART_PRESENT(SERIAL_PORT)
+#ifdef HAS_UART
   ring_buffer rx_buffer  =  { { 0 }, 0, 0 };
 #endif
 
diff --git a/Firmware/MarlinSerial.h b/Firmware/MarlinSerial.h
index 27e722bc0..3bb0926b2 100644
--- a/Firmware/MarlinSerial.h
+++ b/Firmware/MarlinSerial.h
@@ -28,9 +28,12 @@
 #endif
 
 // The presence of the UBRRH register is used to detect a UART.
-#define UART_PRESENT(port) ((port == 0 && (defined(UBRRH) || defined(UBRR0H))) || \
-						(port == 1 && defined(UBRR1H)) || (port == 2 && defined(UBRR2H)) || \
-						(port == 3 && defined(UBRR3H)))				
+#if ((SERIAL_PORT == 0 && (defined(UBRRH) || defined(UBRR0H))) || \
+	(SERIAL_PORT == 1 && defined(UBRR1H)) || \
+	(SERIAL_PORT == 2 && defined(UBRR2H)) || \
+	(SERIAL_PORT == 3 && defined(UBRR3H)))
+#define HAS_UART
+#endif
 						
 // These are macros to build serial port register names for the selected SERIAL_PORT (C preprocessor
 // requires two levels of indirection to expand macro values properly)
@@ -82,7 +85,7 @@ struct ring_buffer
   int tail;
 };
 
-#if UART_PRESENT(SERIAL_PORT)
+#ifdef HAS_UART
   extern ring_buffer rx_buffer;
 #endif
 
diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 01e62f2a6..a650e0638 100755
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -7429,8 +7429,6 @@ Sigma_Exit:
 #endif
           cs.max_jerk[E_AXIS] = e;
       }
-      if (cs.max_jerk[X_AXIS] > DEFAULT_XJERK) cs.max_jerk[X_AXIS] = DEFAULT_XJERK;
-      if (cs.max_jerk[Y_AXIS] > DEFAULT_YJERK) cs.max_jerk[Y_AXIS] = DEFAULT_YJERK;
     }
     break;
 
@@ -9814,39 +9812,6 @@ void controllerFan()
 }
 #endif
 
-#ifdef TEMP_STAT_LEDS
-static bool blue_led = false;
-static bool red_led = false;
-static uint32_t stat_update = 0;
-
-void handle_status_leds(void) {
-  float max_temp = 0.0;
-  if(_millis() > stat_update) {
-    stat_update += 500; // Update every 0.5s
-    for (int8_t cur_extruder = 0; cur_extruder < EXTRUDERS; ++cur_extruder) {
-       max_temp = max(max_temp, degHotend(cur_extruder));
-       max_temp = max(max_temp, degTargetHotend(cur_extruder));
-    }
-    #if defined(TEMP_BED_PIN) && TEMP_BED_PIN > -1
-      max_temp = max(max_temp, degTargetBed());
-      max_temp = max(max_temp, degBed());
-    #endif
-    if((max_temp > 55.0) && (red_led == false)) {
-      digitalWrite(STAT_LED_RED, 1);
-      digitalWrite(STAT_LED_BLUE, 0);
-      red_led = true;
-      blue_led = false;
-    }
-    if((max_temp < 54.0) && (blue_led == false)) {
-      digitalWrite(STAT_LED_RED, 0);
-      digitalWrite(STAT_LED_BLUE, 1);
-      red_led = false;
-      blue_led = true;
-    }
-  }
-}
-#endif
-
 #ifdef SAFETYTIMER
 /**
  * @brief Turn off heating after safetytimer_inactive_time milliseconds of inactivity
@@ -10090,9 +10055,6 @@ if(0)
      WRITE(E0_ENABLE_PIN,oldstatus);
     }
   #endif
-  #ifdef TEMP_STAT_LEDS
-      handle_status_leds();
-  #endif
   check_axes_activity();
   mmu_loop();
 
diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index fbd572570..1b9b25d6c 100755
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -241,9 +241,7 @@ static void lcd_detect_IRsensor();
 #endif //IR_SENSOR_ANALOG
 static void lcd_selftest_error(TestError error, const char *_error_1, const char *_error_2);
 static void lcd_colorprint_change();
-#ifdef SNMM
-static int get_ext_nr();
-#endif //SNMM
+
 #if defined (SNMM) || defined(SNMM_V2)
 static void fil_load_menu();
 static void fil_unload_menu();
@@ -8814,6 +8812,22 @@ void menu_lcd_lcdupdate_func(void)
 #if (SDCARDDETECT > 0)
 	if ((IS_SD_INSERTED != lcd_oldcardstatus))
 	{
+		if(menu_menu == lcd_sdcard_menu) {
+			// If the user is either inside the submenus
+			// 1. 'Print from SD' --> and SD card is removed
+			// 2. 'No SD card' --> and SD card is inserted
+			//
+			// 1. 'Print from SD': We want to back out of this submenu
+			//    and instead show the submenu title 'No SD card'.
+			//
+			// 2. 'No SD card': When the user inserts the SD card we want
+			//    to back out of this submenu. Not only to show 
+			//    'Print from SD' submenu title but also because the user
+			//    will be prompted with another menu with the sorted list of files.
+			//    Without backing out of the menu, the list will appear empty and
+			//    The user will need to back out of two nested submenus.
+			menu_back();
+		}
 		lcd_draw_update = 2;
 		lcd_oldcardstatus = IS_SD_INSERTED;
 		lcd_refresh(); // to maybe revive the LCD if static electricity killed it.
@@ -8832,8 +8846,6 @@ void menu_lcd_lcdupdate_func(void)
 		}
 		else
 		{
-			if(menu_menu==lcd_sdcard_menu)
-				menu_back();
 			card.release();
 			LCD_MESSAGERPGM(_i("Card removed"));////MSG_SD_REMOVED c=20
 		}
diff --git a/Firmware/ultralcd.h b/Firmware/ultralcd.h
index 5aab947fa..462c229d0 100755
--- a/Firmware/ultralcd.h
+++ b/Firmware/ultralcd.h
@@ -167,15 +167,6 @@ void lcd_commands();
 extern bool bSettings;                            // flag (i.e. 'fake parameter') for 'lcd_hw_setup_menu()' function
 void lcd_hw_setup_menu(void);                     // NOT static due to using inside "util" module ("nozzle_diameter_check()")
 
-
-void change_extr(int extr);
-
-#ifdef SNMM
-void extr_unload_all(); 
-void extr_unload_used();
-#endif //SNMM
-void extr_unload();
-
 enum class FilamentAction : uint_least8_t
 {
     None, //!< 'none' state is used as flag for (filament) autoLoad (i.e. opposite for 'autoLoad' state)
@@ -223,8 +214,6 @@ void lcd_pinda_calibration_menu();
 void lcd_calibrate_pinda();
 void lcd_temp_calibration_set();
 
-void display_loading();
-
 #if (LANG_MODE != 0)
 void lcd_language();
 #endif