I have similar. The repair boot flash drive does not work either and I cannot find safe mode.
I made some calls and spent over 30 minutes waiting only to discover that my system no longer has support. The tidbits I did get were slamming me for lack of proper setup in that the disk was not partitioned. I am not responsible for the lack of this as it should have been done when built. I was also told that I should have already removed the battery to fix then told to do so but there is no access as described.
Anyone?