There are a number of threads on here that address "black screen after boot", which you can refer to, including this one: Failure to boot following automatic update
Can you boot a recovery mode?
Post a screenshot of any screen output you get.
There are a number of threads on here that address "black screen after boot", which you can refer to, including this one: Failure to boot following automatic update
Can you boot a recovery mode?
Post a screenshot of any screen output you get.