No image is displayed after turning on my PC.

If there are no display from your GPU after booting up your PC, you can check if:

The power cord of your PC and GPU is properly plugged in.
Your Power Supply Unit is sufficient for the GPU you own.
The HDMI or DP video output cable is plugged into your GPU, not your motherboard
The PCIe gold fingers are clear of dirt and other foreign objects

If none of the above solves your issue, please contact us for further assistance.