Question [HELP!] PC is turned on but Monitor, Keyboard, and Mouse isn't working

May 10, 2019
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Hello, I just bought a new PC with CPU, Motherboard, RAM, and PSU installed already in a casing. I installed the VGA/Graphic card and HDD by myself.

The PC is working fine, the graphic card's fans are spinning, CPU fan is spinning, and the casing fan is also running.

The problem here is whenever I connect the PC into a monitor, the monitor won't display anything! It says “No Signal” or something like that. Same thing happens to my Mouse and Keyboard, they won't light up too.

I'm a total newbie, so if there any expert out there who are willing to help me, I'd be very grateful :D