Not able to upload program in mega 2560

Hi,
I am new to Arduino. I just wanted to ask that today i had by mistake shorted two pins marked as jp5
after doing i am not able to program it and shows this error.

[tt]avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

         Using Port                    : COM4
         Using Programmer              : stk500v1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x03[/tt]

The program which i had uploaded earlier is working properly Please help. :frowning: :frowning: if you want i can give you its picture.
Thanks.

Connect the board to a power supply.
Press the reset button.
The led blinks a lot of times or just once?