Does not charge and booth anymore after some water damage

Hello,

I had some water damage on my MacBook, I have 2 effects:

• with the battery connected on the motherboard, I do see for a short time a message of an empty battery with charge symbol every 10 seconds, but the battery charging does not seem to work - the fan on the motherboard does work for less than a minute, than stops
• with the battery disconnected from the motherboard, I hear the startup chime and a very dimmed Apple logo in the center for about 1 minute or so, tried option/command/P+R but does not solve anything

Any help would be very much appreciated