Shift+Command+4 no longer working since Ventura upgrade
Shift+Command+4 is no longer responsive on my iMac since upgrading to Ventura. I can do a full screen capture with Shift+Command+3 but I'm unable to do a partial screen grab any longer. The keys on the keyboard are working and I've tried it via the cable and wirelessly. I've checked and default settings are in place for the keyboard i.e. Shift+Command+4 has a tick beside this function. I'm at a loss.
Any advice gratefully received as I use this function often.
Thanks.
iMac 27″, macOS 10.13