Older Mega 1280 avrdude: stk500_getsync(): not in sync: resp=0x00

Using Arduino IDE 1.x
1

have an older mega 1280 that can't seem to make a full connection over USB.

when I try to upload a sketch to the board, I see the tx and rx leds flicker back and forth, then nothing, till I get the dreaded avrdude: stk500_getsync(): not in sync: resp=0x00 message.

have tried with an XP laptop, an XP desktop, and a win7 laptop. all do the same thing, and with two different 1280 boards.

The loop back test works. These boards were working fine on a previous project.

I wasted two days trying to get these things to work.

any ideas???

hoke

2

I have exact same problem earlier and when i checked my Device manager, my Arduino Uno R3 had switched its Port to COM7 instead of Com4 that I manually assigned earlier. After that it now working fine. Hope this helps you too.