after installing new GPU no display from both integrated GPU and external GPU.

[ivelinmirchev888u]

so today I installed my new GPU which is RX 570 and it didn't clearly clicked into the PCI slot but it felt pretty solid after that I connected power cables into it and screwed it then my PC started then beeps as normal but it just says "Power Saving Mode" and the monitor LED lights orange.The day before I installed my new GPU I was using my Intel HD graphics but now with the GPU in the PC installed it doesn't display nothing too.So its not the system im using it for like 1 year now with the onboard graphics no problems so I hope you can help me out (Also I changed the place of my hard disk if this matters because of the GPU to fit in) sorry for my bad English tho

 

[Supahos]

If it didn't click all the way in you have problems "felt sort of solid" isn't good enough