I finished building my PC recently. when I turn on the monitor when the computer isn’t on, there’s obviously no signal and I see the bouncing logo, but when the computer is on, it says that there is no signal, and that my monitor is going into standby mode, and the display turns off. my gpu seems to be working fine, and I reseated my ram. What should I do?
Do you have a second monitor to test on the computer? A second computer to test on the monitor?
Try to verify each component works with known good systems. Try a different cable. Try plugging into different ports on the GPU.
Does the Motherboard give you any bios beep codes? Or show a error on a bios display?
Is the display set to the right input method? (display port, vs hdmi, vs usb-c, etc)
Does the keyboard caps lock light go on and off during boot?
You could try putting in only one stick of ram, swapping out video cards, using the onboard display output (if you have it), reseating the CPU, double checking the power supply is tightly connect to all the correct ports on the GPU, and motherboard.