Cleaned laptop after spilling coffee but still won't turn on

In my honest opinion I can’t say it’s salvageable unless you know of someone who deals in micro soldering repairs. By the sounds of things, the coffee and the fact that you used water, even if it’s distilled, means you’ve caused corrosion on the components within your motherboard and they are either damaged or short circuited. This will prevent it from turning on. If you want to learn micro soldering and have some tools, Louis Rossmann on YouTube is a good start, but if not, you will have to send it away for diagnostics or repair or it’ll go in the bin if there’s no warranty / coverage. Sorry.