Long time problem I've tried for a year to fix.
Model: NP5403C-A01UB
Bios looks like:
http://imgur.com/a/h5TF2
And with the HD installed :
http://imgur.com/a/2uIl4#H35euFh
Flash drives are not recognized. I've tried every conceivable varation of CSM / EUFI booting. I've manually written a...