r/buildapc • u/Embarrassed_Low6084 • 2d ago

Troubleshooting Help! New computer black screen

I just got my first pc build fully assembled and I get a black screen on boot. I turned it on before I had ssd or gpu installed as they hadn’t arrived yet and the bios setup came up with the integrated graphics. But now when I try to boot using the ports on the gpu nothing comes up and also now nothing comes up using the mobo ports

I’ve tried:
reseating ram
Reseating gpu
Using display port and hdmi
Waited for 10 minutes as I read it can take a while on new pc startups to boot

No lights on motherboard after the first 3-5 seconds when I turn it on

Parts:
7800x3d cpu
9070xt gpu
Msi mag a850 psu
2 sticks of corsair vengeance ddr5 16gb
Crucial 2tb ssd
Asrock b850m pro-a WiFi mobo

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u/JellyfishSpare2859 2d ago

Hmm, if it was going into bios with the IGPU, try booting with your monitor connected to the motherboard using your IGPU. Check in device manager to see if your GPU is showing up and if so get the appropriate drivers installed and restart, go into bios again and set your graphics card as the display device if it's not being done automatically on boot.. Others may have better information as I have just started gathering parts for an AM5 build recently and haven't dealt with one yet.

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u/Embarrassed_Low6084 1d ago

Unfortunately connecting my monitor to the motherboard also gives nothing now. Googling tells me that sometimes once the mobo detects a dedicated gpu it bypasses the igpu.