I'am found bug in the 1.12.2 OpenComputers

[bebreshka]

For some reason, computers see monitors if you place the keyboards next to each other.

[bebreshka]

Version 1.2.9a (If I'm not mistaken)

[ff66theone]

Keyboards are seen as a full block and the screens check for the presence of a keyboard no matter the position. I guess they act as some sort of cable and lead to a conflict, but to be fair you just have to move the keyboard elsewhere, it's unlikely you have such tight space limitations...
The issue though is that version 1.2.9a doesn't exist on Curseforge, and if it did, that would be insanely old. Lastest version available is 1.8.9 if I'm not mistaken (see the Release section)

[bebreshka]

Yes, I was mistaken; I don't have 1.2.9, but 1.8.9a. Just to clarify.