I'm trying to install a new graphics card for my computer, but it doesn't get past POST with my new graphics card (motherboard doesn't even beep). Give me 5 troubleshooting steps I can try, what they do, and what I should expect from each.
user
Hardware problems can be frustrating. Here are 5 tips to troubleshoot issues with your new graphics card:  
1. Ensure it’s properly seated in the slot. PCIe slots can be finicky and hard to see depending on your case. Ensure the tab at the end of the slot that locks the card in place is fully raised. Try re-inserting the card if anything seems off.   
2. Ensure your power supply has enough capacity for your new card. Since your motherboard doesn’t seem to be posting at all, you may have a power issue. Ensure that your power supply has enough wattage to power your motherboard, processor, GPU, and all connected peripherals like disks. Try disconnecting any unneeded drives or accessories to see if the computer will power on. Remember, your power supply should have a little buffer of extra capacity for unexpected spikes in load. If you’re right at the limit, you may need to upgrade.  
3. Ensure the power cables are the correct cables for your power supply. Never mix cables between different brands of power supply — they make look the same, they may even fit in the same slot, but the pin arrangement may be different and cause you to fry your hardware.  
4. Try removing the card and starting the computer without it. We want to isolate the problem: is it the card, or is it the motherboard having an issue? If the computer is able to POST without the card, then the card is causing the problem. If not, it’s time to expand the search.  
5. Verify that all the power connections and cables to the motherboard are still properly attached. Oftentimes when installing a big accessory like a GPU you’ll have have to adjust the position of internal cables. Ensure that when you installed the card, you didn’t accidentally unplug something else. Double check that the wires connecting the case power button are still connected — sometimes it really is that simple!
assistant
When I removed the card, as you suggested in #4, the computer boot up. I also followed 1, 2, 3, and 5, but couldn't find anything wrong with the power cables or power supply. I then put the GPU back in, and the problem came back.

What should I do next?
user
hi
assistant