Hi there Deastin,
I will be happy to assist you. The water was spilled over the whole laptop in the case you are trying to tell. The phrase you described about "the power button was finickity, now nothing".
Try holding it down for a couple of seconds. See if it beeps or maybe go into diagnostics mode! Might even start windows?
Well incase if this doesn't solve your problem then please reply to this thread and I will be happy to assist you.
Warm Regards,
Acme Gamer