Our client just replaced a PC after a H/D failure and everything is back up and working other than the cash drawer. It's connected to a Star SP200 serial printer on COM1. The printer works fine. The printer and the drawer both test fine from the Star OPOS configuration utility. Also, both are visible and test fine from the device screen in Store Ops (Shift + Ctrl + F5). We've already removed and reinstalled the Star drivers and tried a couple different versions.
So now what...?