pc boot issues

Specs: i7-9700k MSI MPG Z390 Gaming Plus Corsair Vengeance LPX 16 GB Samsung 870 QVO 1TB A pair of old HDDs that haven't been plugged in Windows 10 Home AresGame AGK750 Modular PSU Geforce GTX 1050 TI (MSI Nvidia model and is the one thing that I know works since I had it in my previous "build")...

So I had my pc in sleep mode, I tried to wake it and it started making rapid beeping noises, so I powered it off then on again but it switched itself off then when it came back on it tried to boot to bios for no reason before switching off again, it then restarted again and again, that’s when...

I recently installed an old hard drive to recover some of my old files including some very old Minecraft worlds (for nostalgia), but after the install my pc wouldn’t even boot anymore. At first I misplaced the power button header on the motherboard, but even after I seated it correctly it , the...