Sounds like I lost the com processor reading some of the other posts on this topic. the upload fails but the loop back test passed ok, no tx or rx leds, Uno runs my last skecth ok and blinks the led on reset Any hope of salvaging this UNO r3 or is it ready for the trash can?
windows 7 UNO re3 loop back test passed upload massage: avrdude: stk500_getsync(): not in sync: resp=0x30
I started having this issue today after operating fine for the last week. Tried the loop back and that workd fine. but will not program the UNO 3. My message is similar: avrdude: stk500_getsync(): not in sync: resp=0x30
no tx or rx leds when upload is started need help!