Before you get a new ssd try fresh clean install of Windows on the current ssd.  You still see video on monitor suggesting PC posts.  If it has trouble booting into Windows try clean install to prove ssd still works.

It's a 256 boot SSD.  The system also has a 2TB SATA disk which seems to be fine.  It's not under warranty but it's only about 3 years old.  Maybe the power outage did do something to help it fail.  I've since bought a good quality Furman power bar for it in hopes that there won't be any further power issues.  He did try to restore from a factory image so I doubt a fresh install of Windows would work.  I'll buy the Samsung drive and see what happens.  Will post back here with the results.

Thanks for your suggestions.

I agree with the previous post. However both of those errors indicate a drive failure as you are aware. The fact that diagnostics ran properly and detected only drive errors would lead me to believe that the motherboard and other components are fine. The system is only around 2-3 years old and that is rather quick for an SSD to fail, but the power outage that took out the battery may have damaged the drive in the process. The Samsung 970 drive is a very fine drive but there have been a few users that have seen compatibility problems with Dell systems. But that was some time ago and I believe Samsung may have updated their firmware by now. Just make sure that the retailer you choose allows returns for hardware that has compatibility problems.

Thanks for that information, greatly appreciated. There was a time a few years back that some 970s were iffy (compatibility wise) but it looks like those days are behind us. Again thanks for the update!

Bought the new SSD, installed it, used the OS recovery tool to reinstall Windows.  Everything is happy.  Thanks everyone for your help.