Hi and welcome to the forum 
If you could provide some good information there might be users who can help you solve this issue.
Posting the errors from the journal log could shed some light on your issue.
The command below lists the errors in the previous bootup of your machine, so run it after a successful boot and post the result (see how to provide good info for guidance on the formatting and what is also useful to post)
journalctl --boot -1 --priority=err