problem start

Hi, I have a problem with my PC. Whenever I try to turn it on, the PC loops on and off and won't start. The specs: CPU: i9-9900K GPU: EVGA RTX 2080 TI Black RAM: DDR4 T-Force Nighthawk 4x8 GB HDD: Western Digital WDC WD2000FYYZ 2TB SSD: Samsung SSD 970 EVO 500GB MOBO: MPG Z390 GAMING EDGE AC...