Board A4JP should be SCOOVO_X9H

Marlin/boards.h

 #define BOARD_OMCA              91   // Final OMCA board
 #define BOARD_RAMBO             301  // Rambo
 #define BOARD_MINIRAMBO         302  // Mini-Rambo
-#define BOARD_AJ4P              303  // AJ4P
+#define BOARD_SCOOVO_X9H        303  // abee Scoovo X9H
 #define BOARD_MEGACONTROLLER    310  // Mega controller
 #define BOARD_ELEFU_3           21   // Elefu Ra Board (v3)
 #define BOARD_5DPRINT           88   // 5DPrint D8 Driver Board

Marlin/pins.h

   #include "pins_MEGACONTROLLER.h"
 #elif MB(BQ_ZUM_MEGA_3D)
   #include "pins_BQ_ZUM_MEGA_3D.h"
-#elif MB(AJ4P)
-  #include "pins_AJ4P.h"
+#elif MB(SCOOVO_X9H)
+  #include "pins_SCOOVO_X9H.h"
 #elif MB(MKS_13)
   #include "pins_MKS_13.h"
 #elif MB(SAINSMART_2IN1)

Marlin/pins_A4JP.h → Marlin/pins_SCOOVO_X9H.h

  */
 
 /************************************************
- * Rambo pin assignments MODIFIED FOR A4JP
+ * Rambo pin assignments MODIFIED FOR Scoovo X9H
  ************************************************/
 
 #ifndef __AVR_ATmega2560__
   #error "Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 
-#define BOARD_NAME "AJ4P"
+#define BOARD_NAME "Scoovo X9H"
 
 #define LARGE_FLASH true
 
-/************************************************
- * Rambo pin assignments old
- ************************************************/
-
 //
 // Servos
 //