handshaking

This is a REAL challenge. It seems to be a hand-shaking issue and I am open to suggestions I have an ordinary PC (HP 64-bit, running Win 10 PRO 22H2, fully up-to-date) with an iNTEL HD Graphics 4600 (also up-to-date according to iNTEL). I have the HDMI output through a switch to my desk...