[solved] No video signal from the graphics card after windows 10 finished loading

[Kevin15]

When I turn on the PC, fans spin and everything works, it posts and everything shows up fine, but when windows finishes loading graphics card stops outputing the signal to monitor and leds on graphics card (sapphire illuminated logo) turns off too.
This happens only when I turn on the PC first time. When this happens I hold the power button for a few seconds so it shuts down and then turn it on again and it works fine.

PC specs:
Intel i7-2600K @ 4.3GHz (stable)
Gigabyte GA-Z68XP-UD3P with latest bios
DDR3 1600MHz 2×4GB RAM
AMD Sapphire RX 480 Nitro 4GB with latest driver (tried going back to older and no difference)
PSU Antec NEOECO 650W
SSD intenso 120GB
HDD WD BLUE 1TB

[ST3F4N]

Did u try to flash gpu bios via ATIFlash and did u try with DDU to uninstall drivers in safe mode?

[MrJoosh]

5 minutes ago, Kevin15 said:

When I turn on the PC, fans spin and everything works, it posts and everything shows up fine, but when windows finishes loading graphics card stops outputing the signal to monitor and leds on graphics card (sapphire illuminated logo) turns off too.
This happens only when I turn on the PC first time. When this happens I hold the power button for a few seconds so it shuts down and then turn it on again and it works fine.

PC specs:
Intel i7-2600K @ 4.3GHz (stable)
Gigabyte GA-Z68XP-UD3P with latest bios
DDR3 1600MHz 2×4GB RAM
AMD Sapphire RX 480 Nitro 4GB with latest driver (tried going back to older and no difference)
PSU Antec NEOECO 650W
SSD intenso 120GB
HDD WD BLUE 1TB

I could be wrong here, but with the logo going out and fans stopping it sounds like the card is losing power... As for the reason why, I have no idea..

[Peskanova]

DDU'd ? ,  This happens when tries to load drivers , it can be a faulty psu / mobo that cant bring enough power at start or a bad driver, I bet that If you run without drivers or safe boot it wont happen (because drivers or power). Try to test your gpu to see if your computer crashes when your gpu is with high load -> hardware (mobo/psu/gpu) if not it's not the gpu it can be mobo / drivers

[ST3F4N]

1 minute ago, Peskanova said:

DDU'd ? ,  This happens when tries to load drivers , it can be a faulty psu / mobo that cant bring enough power at start or a bad driver, I bet that If you run without drivers or safe boot it wont happen (because drivers or power). Try to test your gpu to see if your computer crashes when your gpu is with high load.

DDU - display driver uninstaller... To complete clean pc and try with fresh drivers from amd...As u say maybe is PSU / MOBO problem... Maybe u can try to put your gpu in another pc to see what will happend then...

[Mick Naughty]

Turn on igpu and boot that way. Assuming the system isn’t crashing. 

Should be able to see what’s happening then. 

[Elochai]

Have you ever used a 2nd display like an USB 3.0 monitor or on board video ?

 

could be that your profile is set to another display output and when you log into your user account, it try’s to use this other display profile instead of your RX 480.

 

https://www.techadvisor.co.uk/how-to/pc-components/how-set-default-graphics-card-3612668/

 

 

[Mick Naughty]

The lights shouldn’t shut off even if igpu is the primary. Unless that’s some weird amd feature. 

[Peskanova]

It happened to a friend this , its on the motherboard , its an option like @Elochai said, If you have an hdmi tv try to plug that and look if it shows (I had a rx480 8gb that loaded without problem and same model on a friend hapened that , I told to load on a tv and he said me that It was something on bios , the tv load at 1st try but a monitor wont)

[Kevin15]

As I already said I tried different drivers and removed previous with DDU, but still same thing. And when I put a load on a whole system it runs normally and its stable.

[Kevin15]

Now when windows was updating on startup it booted just fine.

[Kevin15]

Sorry for late reply. Figured it out... it was windows fault, I just reinstalled windows and now it works fine.