Photoshop has stopped displaying acquired images from flatbed scanner
I have been using Photoshop to import images from a scanner through WIA Support for years. This has suddenly stopped working. The scanner goes through its normal scan process but no image appears in Photoshop - it doesn't seem to get stored anywhere either. The scanner works using its own scanning software. There is the same problem with my other scanner. The problem therefore is in Photoshop.
The system is Windows 10 and PS is up to date (no more updates available).
It had been running fine for a dozen or so scans yesterday with the A4 image displaying fine once the scan had completed: then is started to go wrong... I had just cropped and saved part of an image, when the next scan only produced an image already cropped. With subsequent scans the visible section of the A4 page got smaller and smaller in the image window in PS. I suspect it may now be 0 x 0 pixels which maybe why nothing displays. I don't even get a blank screen. It goes straight back to the PS main page.
Past images still load fine, I just can't create any new ones through WIA.
Fixes tried so far:
Rebooted the system, started PS with ALT-CTRL-SHIFT to reset preferences several times. The preview area is still the full flatbed of the scanner - a 1200dpi scan took the 'usual forever' thereby proving the scan window is still A4+.
In WIA suport the first panel has "Open Acquired Image(s) in Photoshop" ticked.
Does anyone have any bright ideas to resolve this please?
Thank you