No valid boot device
====================

My work desktop  ceased to work. It says something  like "no valid boot
device available". The pre-boot diagnostics does not see that device (a
SSD). The second SSD (with data) and the DVD drive are both visible. It
happened just  before I came home.  I turned off the  computer and then
remembered that I  forgot to do something.  So I turned it  on and this
thing happened. No tech support was available at that time.

I will call them tomorrow. Until that I will have to use my Lenovo x260
as a main workstation  (I have used a Lenovo laptop -  an x60s and then
the x260 as my only work  computer during 2011-2017). So this situation
is not  new for me. I  hope that the problem  is just a failed  SSD and
they will be able to deal with it easily...