msi 5070 trio oc: No Q-LEDs, no video signal, GPU fans spin – completely stuck on new build

Hi all,

I’ve built a new PC and I’m completely stuck – no video output, no Q-LEDs turning on, and I feel like I’ve tried everything. I’m starting to worry that either the GPU or motherboard might be faulty, but not sure.

Full build:

• Intel Core i7-14700KF
• ASUS TUF GAMING Z790 PLUS WIFI
• MSI GeForce RTX 5070 Gaming Trio OC
• Corsair Vengeance DDR5 6000MHz 32GB (2x16GB)
• Thermalright Peerless Assassin 120 SE
• MSI MAG A850GL PCIe5 (850W, 80+ Gold)
• WD Black SN770 1TB NVMe
• Mars Gaming MCV4 XXL case
• 6x ARCTIC P12 PWM A-RGB case fans

What’s happening:

• PC powers on. All fans spin, including CPU and GPU. GPU RGB lights turn on.
• No image on screen ("No signal detected").
• I’ve tried both DisplayPort and HDMI directly to the GPU (not the motherboard, since the CPU has no iGPU).
• No Q-LEDs turn on at all, not even briefly. The white VGA LED never lights up.
• Monitor and cable confirmed working.
• No beeps (I don’t have a buzzer).

What I’ve already tried:

• Reseated GPU, RAM, CPU cooler, cables.
• Reset CMOS (removed battery for 5+ mins).
• Booted with 1 stick of RAM (A2 slot).
• Disconnected SSD and all case fans/ARGB headers.
• Verified 12VHPWR cable fully inserted into GPU from PSU.
• Tried different DisplayPort cable and different monitor.
• GPU fans spin, so it’s getting power, but still no signal.

I’m out of ideas and starting to worry about a DOA GPU or motherboard, but I can’t test the GPU elsewhere because my other PC is too old. I also don’t have another GPU to test in this new build.

Any ideas or advice would be deeply appreciated – I’m losing my mind over this.