I'm trying to use an old Compaq keyboard that has a PS/2 plug to a USB port on my PC using an active Monoprice adapter. (It has the chip) However, only around 5 keys actually work using the adapter. Rest of the keys do not work. Keyboard traces seem to be in good condition. I tried it with another PS/2 keyboard and it works perfectly fine. Any way to fix this? Is the adapter faulty? I'm using Windows 10 version 1903.