MBP doesn't want boot without SMC Reset (no Power)

Hello,

I will tell you my story, or the story of my MBP:

One year ago, it got some coca-cola from the ventilation by accident, but still working until 2 months ago where it turns off and never turn ON (no reaction when I press the power button, Magsafe working with green led, I tested all shortcuts like SMC, PVRAM,...).

So I gave it to a specialized store that fix MBP main board, they fix the problem, the main part because now 1/2 time I need to use SMC RESET to boot (same problem, it's like no power, nothing when i push the power button, no sound, no screen).

I imagine the SMC can be affected? Also, I checked my disk with the utility and I got error 8, I need to reboot to fix it but i'm a bit afraid to do that.

Do you have any idea of the problem? Do you think the problem can come from the disk ? Do lot of SMC reset can damage the mainboard or something ?

Thanks,