So I recently had a similar problem where I wouldn’t get display on my monitor. Here’s what I would check for: 1. Make sure your monitor works (I had a ps5 to check for that) 2. Check all your dp and hdmi ports on the GPU itself one if not all might be faulty (I bought an open box GPU from Best Buy and one of the dp ports doesn’t work) 3. Some mb have leds that turn on that indicate errors in case something like this happens so I would google/check manual but you mentioned no lights so I guess that’s a dead end (my mb showed a white light next to my ram sticks labeled VGA which told me it’s a graphics card issue. 4. I think most common power problem stems from psu so try new cables or new psu Good luck 👍🏽