Hi john, welcome to the forum
So if I understand you right, you are able to boot the computer in normal mode, or safe mode with networking ?
Look at this tutorial
https://forum.avast.com/index.php?topic=53253.0Scroll down to "Farbar Recovery Scan Tool" and follow the directions for that tool only.
Attach both FRST.tx and Additions.txt logs in your next reply.
I will notify an expert to help you.
EDIT : According to expert Essexboy this sounds like a hardware problem though.
Greetz, Red.