Question My monitor gives a "No Signal" message despite everything being plugged in.

Aug 3, 2020
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I recently built a PC and got a monitor along with it but when I plugged in the HDMI, the monitor says No Signal and I can't fix it even if i plug the cable into the motherboard or GPU. Ive tried a different cable and monitor and I still have the issue. Everything else seems fine though, the CPU and GPU fans run correctly and the LEDs in the case turn on. Is there any way for me to fix this?