Hello there! I am Charity, I'm an Independent Advisor. I'm glad to help you today!
Thank you for the information. Please check if you have done the list below.
-Test One Monitor: Use just one monitor and try all GPU ports.
-Use Motherboard Output: If your CPU has integrated graphics, remove GPU and connect to motherboard video port.
-Reseat Components: Reseat GPU, RAM, and check all power cables.
-Clear CMOS: Remove the motherboard battery for 1–2 minutes.
-Check for Beeps/LEDs: Look/listen for error codes on boot.
-Test Hardware Separately: Try GPU in another PC or use known working parts.
-Likely causes: bad GPU, loose connection, faulty motherboard, or PSU issue.
If steps have been done, please let me know.
Kind Regards,
Charity
Please note that things might need more than one reply to completely resolve your issue, as it will completely depend on the complexity of the question and the amount of detail that you have provided me.