NEED HELP with Arduino

xl_duggle_lx

I am new to this and trying to upload the custom Marlin Firm ware 1.1.8c on my Jgaurora A5 Updated.  However I keep getting a error and not sure what is causing it or how to fix it. I put a copy of the error mesaages below, please help me I do not know what I am doing.

Arduino: 1.8.5 (Windows Store 1.8.10.0) (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

Sketch uses 148076 bytes (58%) of program storage space. Maximum is 253952 bytes.
Global variables use 5164 bytes (63%) of dynamic memory, leaving 3028 bytes for local variables. Maximum is 8192 bytes.
avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified.


avrdude: ser_drain(): read error: The handle is invalid.


avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
the selected serial port avrdude: stk500v2_ReceiveMessage(): timeout
 does not exist or your board is not connected
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: The handle is invalid.


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

RomainD

avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified

You need to select the correct COM port in Tools->Port menu.