I have purchased 20 plus of these mini PCs for our offices and they have worked well, except for one which is not booting and stays stuck on the Beelink landing screen. Setup and Boot menu cannot be accessed. I have reset CMOS, removed and reseated the SSD and RAM, but still not proceeding beyond the landing screen. USB keyboard and mouse have power, and HDMI monitor is working. I use this setp for setting up PCs and diagnostics all the time and other mini S PCs work well so it would seem to be this PC is faulty? Please advise what I should do.