After spill computer turns itself off (Problem fixes when...)

So my gf spilled some juice on her Macbook Air and we took it to a place where they supposedly cleaned the pieces to remove corrosion, the problem was that when you turn on the macbook, the screen turns itself off for a flash or the macbook enters in hibernate mode by itself randomly but when I got it home, I opened the computer and removed the I/O cable and the computer worked without any problem (besides the fan running at a 100% and the kernel task issue) so, after that I realized that the problem was either the i/o board or the i/o board cable, I would like to add that if I disconnect the battery and the i/o board cable I can use the computer without the main trouble of it entering in hibernation or the flashing screen but with the same kernel task + fan at 100% issue so, I dont know if I should change the I/O board or the cable itself

+ The macbook wont hibernate when closing it (the trouble appeared with the spill) and I already checked all the software configurations.