Logitech K400 Plus

I'm really hoping someone with experience will be able to help me. I'd be deeply grateful for guidance. I'm looking to buy either the bluetooth K480 or the K400+ for my dad who uses a OP6T. I've been reading for days and cannot clear answers to the following questions: 1. At some places it...

I bought a new PC and monitor. Using both hdmi cables or display ports as display options results in me being stuck in the BIOS utility menu. If I try to save and exit the screen will flash blue saying no hdmi signal or no DisplayPort, depending what I'm using Specs: Processor- Intel Core I5...