I recently built this new PC:
5700x
Radeon 6600 (Gigabyte)
TeamForce 8x2(16gb) RAM
Thermaltake 700w PSU
512 M.2 + 1TB HDD
Was tidying up some cables and found that I could not get the PC to start anymore. Would run for 30 seconds, no output or other signs of issue, then loop seemingly...