I'm having same problem but not Identical .On my blank screen i got the message:
Gave up Waiting for root device.Common mistakes: -Boot args (cat-proc-cmdline) - Check rootdelay = (did the system wait long enough ?) - Check root = (dod the system wait for the right device ?) -Missing modules (cat/proc/modules:1s/dev) ALERT ! /dev/disk/by-uuid/bf9f2341-0892-4a7d-896a-490 eaedeb558 does not exist. BusyBox v1.19.3(Ubuntu 1:1.19.3-7ubuntu) built-in shell(ash) Enter help for a lish of built-in commands
can't figure it out.