After each step, you should wait until you've receive (any) response from the drive.
This is where some people do things wrong: they issue the "Format Partition"-command:
but don't wait until this (or an error-) message is returned:
User Partition Format 5% complete, Zone 00, Pass 00, LBA 00008DED, ErrCode 00000080, Elapsed Time 0 mins 05 secs
User Partition Format Successful - Elapsed Time 0 mins 05 secs
It's highly unlikely (but not impossible) that you're only able to get a command-prompt
back after 2 power-cycles, instead of just 1.
In any case, this wouldn't make much different; you could even do a power-cycle 10 times
if you'ld like or continue un-bricking two days later...
...if it's done at the correct point in the un-bricking sequence
So why it isn't responding as expected... I really don't know