Water damage, already tried to clean with deionized water

Hi there, I have a Macbook Air mid 2012 - 11 inches model - a1465, I drop a beer on it and after a couple weeks still won't turn on.

I've unmount everything. cleaned with alchool and deionized water and let it dry for weeks.

With a multimeter I've checked that the I/O board take the electricity and transfer it to the logicboard with the black cable but the charger (that works) keep the led grey. There's a way to check in which part the electricity stops? There's a way to check if the keyboard works? Maybe my mac needs just a SMC reset... How can I reset it without the keyboard?

Any suggest?

Someone know a great service for something like this in UK?

Please don't reply " Apple ", because my computer is a CTO (top CPU and top RAM) so in that case is cheaper buy a new one.

Please help!