Combo Box Changing on Exit or Open

Hi, I have a combo box, value linked to a cell. Save workbook. Exit. (These are ActiveX boxes on worksheet.)
Re-Open, can see value in box as saved
Excel is running something prior to being able to work in sheet, and then value disappears.
Has to do with a change event I think, but nothing should run automatically on open.
There are no on open/on close workbook events.

How can I track this down? Nothing should run on open. It may have to do with a change event, but nothing has been changed.

Any debugging suggestions would be most welcome.

Can I EnableEvents false on open? How to change back?

Update - debugging - on exit it runs the change event on a different box (ClientType) that affects the one losing value (Fees), but I don't know what would cause that. What would trigger a combo change on exit??? It doesn't change the value of ClientType, only on Fees

Thanks