HDMI KVM switch not recognizing laptop

Solution 1:

After a long exchange with the poster, and quite a few tests, the relevant points that are left are listed below:

• The Samsung Series 9 no longer works through two different KVMs
• Two other computers have no problem getting through both KVMs
• The Samsung Series 9 can directly connect to the monitor, just not through any KVM.

My conclusion is a hardware degradation on the Samsung's video adapter. Perhaps a weaker video signal has some problem punching through a KVM.

As the video adapter is integrated into the motherboard, it's likely not worthwhile to further invest in this computer.