I remember this show from the mid-nineties (I could be hallucinating, it could be late eighties.)
Basically a there was kid was able to go into a computer if he did something a certain way. There were other kids who were able to go in.
It was live action (for most of it).
When they went into the computer they got armor and other things.
If you need any more info from what I remember please ask me.