diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index de212ac1f6..502fa17c68 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -98,7 +98,7 @@
  *
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
-#define SERIAL_PORT -1
+#define SERIAL_PORT 2
 
 /**
  * Serial Port Baud Rate
@@ -120,7 +120,7 @@
  * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
  * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
-//#define SERIAL_PORT_2 0
+#define SERIAL_PORT_2 -1
 //#define BAUDRATE_2 115200   // :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000] Enable to override BAUDRATE
 
 /**
@@ -408,7 +408,7 @@
   //#define MKS_PWC                 // Using the MKS PWC add-on
   //#define PS_OFF_CONFIRM          // Confirm dialog when power off
   //#define PS_OFF_SOUND            // Beep 1s when power off
-  #define PSU_ACTIVE_STATE LOW      // Set 'LOW' for ATX, 'HIGH' for X-Box
+  #define PSU_ACTIVE_STATE HIGH      // Set 'LOW' for ATX, 'HIGH' for X-Box
 
   //#define PSU_DEFAULT_OFF               // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY      250    // (ms) Delay for the PSU to warm up to full power