Free mouse movement.

Greetings, All! Computer - Scorpio green, keyboard and mouse controller Scorpio. Lately, the mouse has _almost_ stopped moving horizontally. More or less it can be moved left and right in zigzag movements, and sometimes it moves away on its own (arrow) in a horizontal direction. This is observed in all programs that support the mouse, including Tenevik. The mouse is active, working, Microsoft, two-button. I assume that the issue may be with the transistors on the controller. Has anyone encountered this problem? Best regards, Alexander Kushnikov aka Sander.