I bought a brand-new Armoury Phantom prebuilt PC and an LG UltraGear monitor yesterday. Everything worked normally during setup, but after choosing Windows 11's "Update and shut down" option, the monitor now shows no signal. I've already unplugged and reconnected the cables, but I have very little computer experience. The keyboard's Caps Lock and Num Lock lights also don't respond when I press them. What can I safely try before taking the PC back for diagnostics or warranty service?
1 Answer
Start by completely powering everything down. Unplug the PC and monitor from the wall, disconnect and reconnect the HDMI or DisplayPort cable at both ends, wait about 10 seconds, then power on the monitor first and the PC second. Make sure the display cable is connected to the graphics card ports rather than the motherboard video ports. If the PC has multiple HDMI or DisplayPort sockets, try another one. You should normally see the manufacturer logo or BIOS screen before Windows loads; if there’s still no image and the keyboard lights don’t react, it may be a hardware or startup problem rather than a Windows driver issue.
I’ll try the other ports and a full power reset. If nothing changes, I’ll probably return it under warranty.