Amiga 600 mouse issues

[centrespot]

Hi

I have an issue with one of my Amiga 600 boards, the on screen mouse moves down when the mouse is moved up and down and on screen it moves to the right when the mouse is moved left and right.

I have swapped U34 but that didn't solve it.

The mouse works fine on other boards.

Does any one know why this is happening.

Thanks in advance.

[centrespot]

I did some continuity testing and found it was down to two tracks corroded in the same spot, it's now sorted thanks.