This might be memory compatible issue. Please try to change the following setting in CMOS to fix the problem.
1. Clear CMOS then reboot the system.
2. Try to change CPU or memory module if system still won't boot.
3. After boot up, press Delete key in POST goto CMOS> Performance > Memory timing config > Memory config > Power down > disable.
4. Save and exit the CMOS, then reboot the system.