my new PC won't run bios, can't connect to monitor, and can't even turn on, it runs for a few seconds then shuts off, then a few seconds later turns on again, and this repeats until i unplug the power cord
If it is a brand new PC, it may be updating the operating system. Turn it back on and let it reset as needed for a while. If it is updating , it may do that for 15 - 20 minutes.