Asus VG248QE giving me "No signal" for HDMI and DVI.

Jul 27, 2018
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I recently bought a ASUS VG248QE monitor off of Amazon, and I have been having an issue. It says "HDMI No Signal" or "DVI no signal" when I try either of them. The cables are plugged in correctly, and I honestly don't know what to do. It's connected to a PC that was custom built for me. I used another monitor before I bought this one, and it worked fine. (Using HDMI) can anyone help me out?