Can't upload a sketch to arduino uno.

Hello,

Whenever I connect my arduino uno board to my pc it lights up the leds and every thing but when I try to upload a sketch to it it say's that error:

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xda

and doesn't upload the sketch.

It happened suddenly after I was playing with some 12V led strips and a transistor and I assume that burned my controller but it turn on right my model on arduino is this:

Can any one tell if that is the problem, and what to replace in order to make it work?

Thanks for your time.

Hi Mike.

Did you do the loopback test ?

There’s a lot you can find on this in the troubleshhoting section.