Faulty keyboard or pcb

Hello everyone,

I have MacBook Pro as mentioned that hasn’t been working couple years. I finaly decided to try to repair it.

The issue started appearing with keyboard problems the O key and V key started to acting up, later on the space bar. Then the power button worked only sometimes, but now I can’t turn the laptop at all.

I googled a bit, found some advice, press some buttons before start, disconnect the battery and reconnect which should start up the system, nothing worked.

So I just wonder wether there is a way to diagnose if the problem is the faulty keyboard, logic board or both …

Would appreciate any help.

Thank you :)

Thank you everyone, especially to mayer - very helpfull reaction. I can confirm it’s probably keyboard water damage as you mentioned (laptop start up when I disconected battery and hooked up the charger) - no moisture spilled, but I realized it happened after I left my laptop in basement over night with high humidity. Will buy new upper case and try to use my DIY skills :D - looks a bit scarry but it’s nicely described.

Thank you again and have a nice rest of your weekend.

Radim