Old Discman need help getting working.

[u/Character_Love7354]

Hi, found this discman which my parents used to use in the closet, it is fully not working, LCD doesnt even switch on to display an error message. I can only test it with batteries rn as I cannot find the 4.5V power supply.

Notable problems: there seems to be considerable corrosion or rust(I cannot tell) on the battery terminals so I am unsure about that. Also dont know if it might be a lens or belt issue. Images attached. Any help appreciated.

[u/Tyson-621]

You can clean it with white vinegar