Quoting ikjtel <ikj1234i(a)yahoo.com>om>:
This is not
about an issue with the connection, there was, and
eventually led to the Pi being replaced as faulty or melted down from
use of OP25 :) ;)
I too had a bricked PI - suspect that it was due to my omission --
failure to install the 2 heatsinks.
Could you please confirm whether or not your failed PI had the
heatsinks installed...
NO HEATSINKS.
The new one does, and actually I am putting it and others in a case(s)
WITH FAN(S).
USB ports seem to be "warm" as well.