Yup - pretty common problem... Your 1200 (And I suppose all 1200s) only support Reset through the internal keyboard connection. The keyboard itself has a controller which transmits the special reset code down the wire, then resets itself (the flash you see), but the A1200 doesn't know what to do with this signal as its own keyboard controller *didn't* send the signal through a dedicated line for reset. Only way around it is to install a reset button hack (I did, works fine) or maybe a reset commodity that looks for a different combo. I wrote one years that rebooted when you pressed CTRL-ALT-DEL, but I'm damned if I can find it now...