Laptop will only boot and work with some key pressed

Hi all,

Here’s a challenge for you. My 2012 macbook air died some while ago, but managed to bring it to life in a very peculiar way.

In short, it will not boot, with or without power cable on. However, if I keep some key pressed, it will boot fine and will work without issue, aside from fan speed on max and zero indication of battery charging (coconut won’t even recognize it) or cable light.

The moment I let go of the keys, within 2 seconds it’ll go dead. I’m writing this with my pinkie pressing the tab key :)

What should I need to replace? Battery, keyboard, or both?

Looking forward to your feedback!

UPDATE: when letting go of the keys, I’ll actually get the shutdown prompt, which if unattended will then turn off the laptop. Almost like the keyboard is constantly sending the power off signal.

Also, Coconut screen grab:

Thanks

/R