If you have a switch on suicide pin, this is useful if you want to

start another print with suicide feature after a print without
suicide...

Marlin/Marlin_main.cpp

@@ -1825,6 +1825,15 @@ void process_commands()
       case 80: // M80 - Turn on Power Supply
         SET_OUTPUT(PS_ON_PIN); //GND
         WRITE(PS_ON_PIN, PS_ON_AWAKE);
+
+        // If you have a switch on suicide pin, this is useful
+        // if you want to start another print with suicide feature after
+        // a print without suicide...
+        #if defined SUICIDE_PIN && SUICIDE_PIN > -1
+            SET_OUTPUT(SUICIDE_PIN);
+            WRITE(SUICIDE_PIN, HIGH);
+        #endif
+        
         #ifdef ULTIPANEL
           powersupply = true;
           LCD_MESSAGEPGM(WELCOME_MSG);