When i move the mouse it doesnt move but it acts like im pressing buttons
Mouse buttons do not work when pressed.
OK, so in summary neither movement or button presses are working, but when you attempt movement then you get the same behaviour as when the buttons are pressed. i.e. objects underneath the pointer get selected or the top menu gets selected. It's even more unusual that movements could be triggering left/right button presses.
It's unusual that both the movement and button presses are affected as these functions are handled by completely separate function blocks on the main board.
The buttons don't require any 5V on the mouse port to operate, they simply pull the relevant lines to ground/0V. So it maybe worthwhile checking you have a valid ground on pin 8 pf the mouse port. You should measure less than 1-2 Ohms from pin 8 to the chassis or general ground on the main board.
Trying another mouse is a good suggestion too. Also make sure the front panel key switch is in the run position, but this will only affect mouse movement and not button presses. Check the mouse port ribbon cables are plugged into the main board correctly and not offset by one row or anything silly.
See if the joystick port is working or has the same problem. Use one of the many applications from Aminet for this, e.g. JoytestMUI.
If you have any test instruments, you can see if there is quadrature data at the input of U541 (pins 2, 3, 4, 5). A4000T schematic of this
here. My paper copies of this are hard to read, but the circuit is practically identical that of the
A4000D.
Likewise, the button inputs are easy enough to test. Pin 36 on Paula should go from 5V to near 0V for a right mouse button press and pin 10 on U350 should go from 5V to near 0V for a left mouse button press.
