arduino not in sync

[chuspy]

Imam jjedan problem sa arduino unom. Prije par dana sam stavio programcic koji cita sa a0 porta i to je sve radilo. Jucer sam ga monirao u kutijcu, spojio sa senzorom na 12v i isa napravit promjenu programa, ali od tad se ne mogu spojiz na njega :/
Komp ga vidi kao Uno port 3 (probao promjenit i 4), svjetli LED ON i kad stisnem reset ledica blinka 3 puta sta bi trebalo rec da ima boot loader ali daje poruku dole prilikom uploada i ne svjetle tx i rx. Odabrana je dobra ploca na dobrom portu, pa sta mu bi odjednom



avrdude: Version 6.0.1, compiled on Apr 15 2015 at 19:59:58
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch

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

Using Port : COM4
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x95
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp