No Signal after installing new RX 560 2GB

[nediim.97]

Hi everyone,
I recently bought brand new RX 560 2GB graphic card.. But when I turn on my PC it doesn't shows any signal on my monitor. Graphic card is working on another PC but on my nope. Fans are spining but can't get signal, please help to resolve this problem. PSU is 475w
MY PC SPECS:
Lenovo M91p thinkcentre (4524Y45 model of motherboard)
BIOS from 2014, have UEFI system..
i3 2120 3,3GHz processor
8GB of ram ddr3
I installed new Windows 7 64bit, no old drivers only intel HD graphic card.
BTW i switched from HD 6870 graphic card.
THANKS EVERYONE!

 

[bjornl]

connect your monitor to the on board graphics (not the video card)
Reboot.
Go in to your BIOS and see if there is a setting for onboard graphics vs add-on card. (sometimes in bios it is simply called the PCI bus or PCIe slot or similar). If there is such a setting, change it to the add-on card.

 

[nediim.97]

Can't find onboard graphic, it only has 'Boot mode (Legacy, UEFI, AUTO) and Video devices (PCI, PCIE, AUTO)

 

[bjornl]

For video devices, try PCIE

 

[nediim.97]

For video devices, try PCIE

Yeah, tried already but same result.. I have gaming keyboard and when i press any button keyboard start to flash for one second, also I don't need to hold power button to shut down PC, just press one time and PC shuts down

 

[bjornl]

Does the 560 require aux power? If so, is it plugged in?

 

[nediim.97]

It require 1x6 pin, it's plugged in. I don't know, I'm afraid that my motherboard doesn't support this GPU, asked on Lenovo forum but no answer, maybe PSU but i don't think that PSU is problem, coz HD 6870 is more power hungry GPU