Boot looping is usually caused by an overheating CPU. When the CPU overheats and the system restarts, the problem is called a thermal trip error.
Since you are able to boot into BIOS, check the temperature of the CPU immediately after the system shuts down. In general, the temperature should not exceed 80 degrees Celsius.
Also, check to see if your fans run when you turn the system on. Make sure your CPU’s thermal paste doesn’t need replacing and that the cooler is firmly attached.