|Pull the RAM sticks out and then power on.|
If you get beeps, that's good. That means your motherboard/bios is working and has detected the missing RAM.
If you plug in the RAM and do not get a display, and do not get any beeps, the motherboard/bios is not working. One of the RAM sticks is bad, or you are not inserting them correctly and it's stopping the motherboard from operating..
The three most important things in computing:
1. Backups, 2. Backups and 3. Backups.