So whenever i plug in the usb cable to the duemilanove and the 13 Led lights up a millisecond and the power led turns on like normal but immedietly fades off. Also it gets super hot around the barrel jack and the RB940 chip right to the right. The usb socket also gets a little warm. Whats going on? I haven't ever shoved 12v through it or anything like that.
It only happens when i have my arduino connected to the atmega328 on a breadboard ready to bootload
Sounds like you have some wires crossed. Double check your connections.
Sounds to me like you have short circuit from +5vdc to ground somewhere that is causing the USB thermofuse to open up after a moment and remove the +5vdc from you circuit. You might try removing everthing wired to the arduino board and then plugging in the USB, load the simple blink sketch as see if you still feel heat in those areas mentioned.
Lefty
yea i had a pin going to 5v when it should've been to ground. my bad