HP laptop dodgy keyboard?

grumpycrab

Very strange symptoms. Some keys don't work... 2 w s x b space and "\" generates "\18:52 14/09/2019" !?
Have reseated the keyboard ribbon cable; an external keyboard works. Tried diagnostics and it reflects the same problem.

Tried a different laptop keyboard (second-hand) and a different set of keys don't work... - + / + = (ie a set top-right of the keyboard);

Looks like a motherboard fault to me. Could this be a software thing? I've uninstalled the PS/2 driver. Getting deparate now...Cheers.

that

it could be a software thing. Every time I have has this, it has always been the electronics. Usually for me it was the electronics on the keyboard end, but not always.

A few times I could calculate which line it i by converting the ascii character to binary, and after comparing a few characters found one line that, never changes, but as integration became more encompassing, the task became pointless, but it still could be a bad ribbon connector or broken track

grumpycrab

I don't believe this. I've updated the BIOS. And it seems to have fixed the issue. I won't believe it until its worked reliably for a couple of days at least. And I usually tell people to leave the BIOS alone.
Just last week a BIOS update (Toshiba) got a SSD working.
Will report back...

that

In my day they had a chip that converts the DIN serial keyboard to parallel data, now it seems to be bios.

I do not understand this vid, but after 15:10 mins it possibly describes the items you want
https://duckduckgo.com/?q=laptop+circuit+diagram+keyboad&iar=videos&iax=videos&ia=videos&iai=SE8Htax4vPE