Based on the troubleshooting you performed that may be an issue with the processor. In order to make sure about that, let me suggest to try to reset the BIOS to defaults performing a clear CMOS on the motherboard, with the power supply unplugged take out the battery of the motherboard for at least 40min, after that, put the battery back in and power on your system again. In case the issue continues, if you have the possibility, try to test your system with another known work processor to determine if the issue continues as well.
If you have issues with the processor please contact your local support team. Please check the link below: