https://www.asus.com/support/FAQ/1029959/
One long and three short beeps in the ASUS beep code table is No VGA (graphics card) detected. (I know you said four long beeps, but you said you think they're four long beeps.)
Try the RAM individually.
Replace the CMOS battery (it's a very cheap battery the size of a pound coin or so, but thinner).
Check your motherboard risers are properly fitted and that the mobo is clear at the back.
Check the CPU power cables are properly attached.
Try it with the GPU installed.
The CPU mounting bracket will, if the CPU is installed correctly, prevent the pins from being crushed - the PCB that the chip is embedded into will take the pressure, not the CPU itself.
Thank you!
I will go through each. A couple of these jump right out at me (like video), but others are new, like replacing the battery - which I guess since I upgrade at least one every three years I have not needed to do previously. But then again one interpretation of the beeps is battery.....hmmmmm.
Thanks!
Scott