Question No POST, EZ led CPU turns on but fans spin

[NJX20]

Hello, I was trying to install a 2.5 SSD. To do this I unplugged what I thought were sata power cables from the PSU.They weren't, but I don't remember what I unplugged. I tried booting the computer up, no POST. I swapped my old HDD back in, still no POST. I checked the CPU, no bent pins. I'm at my wits end. Help would be appreciated, I recall having this exact issue the day I built my PC, but I can't remember what I did to rectify it
Specs:
Mobo: MSI B250M PRO-VD
CPU: Pentium G4600
PSU: Corsair CX550M
Any help would be appreciated, this has kept me up far too long

 

[white.a.drew]

Hello, I was trying to install a 2.5 SSD. To do this I unplugged what I thought were sata power cables from the PSU.They weren't, but I don't remember what I unplugged. I tried booting the computer up, no POST. I swapped my old HDD back in, still no POST. I checked the CPU, no bent pins. I'm at my wits end. Help would be appreciated, I recall having this exact issue the day I built my PC, but I can't remember what I did to rectify it
Specs:
Mobo: MSI B250M PRO-VD
CPU: Pentium G4600
PSU: Corsair CX550M
Any help would be appreciated, this has kept me up far too long

Try reseting the cmos

 

[NJX20]

Yeah I already reset the cmos, still no post