PC doesn't post after self-inflicted power outage.

Hello. I accidentally caused a power outage last night while my PC was running, it happened when i was using my toaster oven to heat up some food in my room. I switched the breaker back on, PC turned back on just fine and I used it for several hours without any issues or symptons of issues. I put it to sleep and went to bed, when i woke up and tried to wake the PC. There was no signal to the monitor, which was my first sign something was wrong. I then held the power button for 5 seconds, the PC turned off but then very strangely, it powered back on by itself. It then turned off by itself, and turned on and off by itself 3 times before staying on, of course with no post. At this point, I cant turn off the PC anymore using the power button, i have to manually kill power from the PSU I/O switch. I power cycled my PC by switching it off, unplugging power cable, and holding power button for 30 seconds and then waiting a minute before plugging it back in and switching it back on. I then looked at my EZDebug lights while powering it on, and saw that it flashed the red CPU light and switched to yellow DRAM light exactly 2 times before all debug lights turning off with the PC clearly remaining powered on. Now no power is being sent to my USB peripherals. I can tell because they all have RGB lighting.

My PC specs:

* Phanteks P400A case * 5X Cooler Master MF120 fans * MSI Z790 Gaming Pro Wifi motherboard * Intel i5-13600KF CPU and Thermalright Phantom Spirit 120 EVO cooler * XFX Radeon RX 7900 XT Merc310 Black Edition GPU * 32GB (2X 16GB) G.Skill Trident Z5 RGB @ 5600 mt/s RAM * EVGA 1200 P2 power supply * 1TB WD Black SN850 SSD w/ heatsink

All I can think of is some component failing, but that only became obvious after my PC was in sleep mode overnight. Can someone tell me what I should do from this point forward?

EDIT: RIP RAM stick, 2024-2026. You will be forever missed, and RMA'd back to G.Skill for a replacement.