Black screen after login after chrome update
I have an older Toshiba chromebook. A few days ago I did the chrome update that was pushed out - thereafter, after I log in my screen goes black and remains so. If I run hdmi cable to tv, and restart, I see both screens for approximately 30 seconds, never to repeat again unless i power down and restart. During this time I can briefly open and make entries such as opening a web page, etc, then black again.
If i login as guest, all is well, but I want my login back as normal. I hesitate to flatten it and start over - my backup is not that current, but will if I have to.
I am requesting assistance that is short of a power wash.