Maybe unrelated, but my wife's Asus Win8.1 laptop just had a blank screen yesterday after an automatic update. I eventually got it working by taking out the battery and removing the power cord (I don't think it was shutting down properly to complete the update process). I switched it back on using power cord and no battery. It then completed its updating and now works normally.
Huawei Mate 20 Pro review: In-depth hands-on