I recently purchased this Amiga 1000. It did not boot but after replacing a CIA it boots. The keyboard works, external floppy works, but mouse does not work. I connect the mouse to an external power supply, and an oscilloscope and I can see a pulse train when I spin the ball. So mouse APPEARS to work.
I examined all caps on the motherboard and see no signs of leakage or bulging. The machine shows no symptoms of bad caps other than the mouse.
Anyone know which likely causes are of the failure to detect mouse movement? Both buttons work, but no movement. IC22 (74HC157) is the only thing which stands out. Could also be cracked solder joints at the port.
Thanks
