Does it shut off during a specific workload? Gaming, or just idle browsing?
#pc turning on and off constantly
analog remnant
analog remnant
So it's power cycling without ever booting.
Do you know how to reset the BIOS/clear the CMOS?
Your motherboard manual will tell you. It's available online if you don't have it anymore
subtle coral
try reseating ur ram again, when i has this problem it's because my ram was loose