Can't upload sketch. Tried everything.

Hi.

When I go to upload a sketch to my Arduino Duemilanova ATMEGA328 I get the following error:

avrdude: stk500_getsync(): not in sync: resp=0x00

I performed the "Loop Back Test" and all seems fine. Anything I type in the serial monitor is echo'd back to me.

One strange thing, under normal use the Serial Monitor is filling up with random data. I assume this is causing my problem:

It churns out this data at a rapid rate. If I leave the serial monitor open, it will eventually crash my machine.

Hope someone can help, looking forward to getting some real work done.

Thanks.

I've also tried two different usb cables and two different machines. :roll_eyes:

Check for "chip creep" on the ATmega. Firm squeeze (but not gorilla) on both ends of the uC and check.

Check with other bauds speeds, maybe the data have some sense