According to the manual, you should always scan from the HP scanning software to scan slides using Scanjet transparent material adapter. There is no button that you can set for default slide scanning properties. This is shown on page 8 of the manual for the 3500 series scanners. The manual is available here:
https://www.manualslib.com/manual/72847/Hp-Scanjet-2300c-Series.html?page=13#manual .
Since the scanner works with pictures, make sure that the TMA adapter is plugged into the back of the scanner. Next open the software, HP Photo & Imaging Director. In most versions of Windows, press Start and look for the HP programs heading. Expand this to find the executable file. Alternatively, find the icon on the desktop or find the software in the file explorer (Program Files/HP/ on 32-bit versions, Program Files (x86)/HP) and then the appropriate sub-folder. Now try to scan the slides when they are loading in the adapter.
I hope this helps. Please add a comment with your OS if you are still having problems. Some newer OS versions may have installed generic drivers for the ScanJet 3570C. The generic driver might not communicate with the TMA properly.)
Cindy Wells
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