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Question New system, no monitor signal

DownTheSky

Senior member
Apr 7, 2013
772
139
106
System is:
i5 10400f
ASUS TUF B460-PLUS
16GB G-skill Aegis DDR4 3200

the mobo has 4 debug leds
CPU
RAM
GPU
Boot

It goes really fast through CPU and RAM leds, then gets stuck at GPU led. After 2-3 sec Boot led turns on, and the gpu led stays on. All fans spin until I turn it off except for GPU fan which turns off by itself (its supposed to do so).

what I've tried:
- rebuild and running it open bench bare minimum (mobo+cpu+ram+gpu)
- 2 graphic cards
- 2 PSU

none worked.

ASUS site tells the mobo has 10400f support since bios 0401

Is there anything else I could try? Maybe some mobo settings I don't know about or something.. Cheers guys, really hoping someone could help.
 

DownTheSky

Senior member
Apr 7, 2013
772
139
106
10400f doesn't have onboard graphics

ASUS support page says if debug LED stays on means it's a problem. My VGA debug is staying on.

Everything starts as it should, keyboard and mouse turn on, but no monitor signal. Tested with 2 working graphic cards, one is in the pc I'm currently using.
 

MalVeauX

Senior member
Dec 19, 2008
618
149
116
Assuming you cannot see BIOS values, no idea what is set there? If you're putting in a PCIe GPU and its also not outputting signal (try VGA, DVI and HDMI, etc), then something is definitely going on with the motherboard.

Very best,
 

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