What I remember is the show was
- Live action
- In English
- At earliest late 80s, most likely 90s, definitely not more recent than early 2000s.
One crucial early plot device was a portable computer, roughly suit-case sized, that a younger wiz kid receives, (possibly wins at a computer related competition in their school).
The kid is then accepted to some (shadowy?) organization or school, and to get into the building, he has to insert the computer into some slot in a wall next to the door: the computer acts as a key of some sort. Later, his (brother and) friends try to save the accepted kid from the institution.
There was probably multiple similar kids also there.
Unfortunately that's about what I can recall about the series.
I've searched around and the closest was Dark Season where they hand over computers to kids, but since it lacks the scenes I described above, I'm all out of ideas.