[SOLVED] Boot issues (Switches on and off, and then repeats itself)

Aug 11, 2020
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Hi, I've just experienced a old issue with my PC. Before this, sometimes it wouldn't display anything but the PC would keep restarting. I thought it was a PSU issue and had it changed and the issue didn't occur anymore. But it just happened again and I'm not sure what the issue is.
CPU: i7-3770
MOBO: Z77P-D3
GPU: GTX 1060
PSU: Seasonic S12III

I have tried:
  1. Changing the CMOS battery
  2. Changing the PSU (After getting a friend to help me test)
  3. Taking out the RAMs

Any help would be greatly appreciated, thank you!