SSD Boot Drive Problem

[Slayd]

Hello everyone! I hope your all doing well. I am a complete novice with PC's. After getting back my motherboard from MSI after a RMA claim and getting a new processor, my pc after putting it back together still wasn't posting and I couldn't access the Bios. LED debug now lights up on VGA before it lit up at CPU. My graphics card is brand new, I only bought it a couple months ago. In a youtube comment someone suggested to switching out sata cables and to unplug all storage components including the Nvme. Come to find out my boot drive is causing the VGA debug to light up and not post. I can't even access bios. After unplugging it I can now access my bios and I'm also able to access it after installing my Nvme drive back in. What should I do? I'm guessing I need a new boot drive, but where or how should I get it. I have an extra 120gb ssd laying around and thinking about making it my temporary boot drive until my i get something with more storage. Any help or advise is much appreciated, Thank you!!

 

My PC build if anyone needs to know

Mobo: MSI MPG z590 gaming plus

Processor: I9 11th gen

Graphics card: MSI 4080

Corsair vegeance LPX 16gb DDR4