accidentally, I pour half a glass of brandy on my laptop keyboard.
now, the laptop is botting up ok but none of keys work even before windows is loaded.
Windows recognise the keyboard in device manager.
do you recommend to open the laptop and clean the keyboard? could it be only a disconnection?
many thanks

If none of the keys work I doubt if just cleaning it will fix it, although I suppose that would be the first thing to try.

If everything seems OK except the keyboard then I'd guess the electronics in the keyboard are shot. You may need to replace the keyboard. Check ebay. I was looking there recently for a dell laptop keyboard and they were all over the place. But whether you just clean it or replace it you'll need to open the laptop.