My MacBook Pro dosen't turn on

Yesterday morning, I spilled some coffee on my macbook. After a quick cleaning machines, I tried to know the damage. At first sight, there is the enter key and delete does not work anymore. I then opened the buttons and I cleaned and it works.

I used my mac all day until 6am without any worries. I turned off my mac and normally I wake up in the morning with surprise: my mac does boot.

I initially thought that my mac has no battery, I check the lights on the battery and they were all green (full battery). I tried plugging in the charger and the green light it. Pressing the button switch on has no effect.

I searched the internet and tried all the manipulations talking resetting SMC but seems no handling market.

I then opened my mac to try to disconnect the battery. I followed this tutorial :MacBook Pro 13" Unibody Mid 2012 Battery Replacement

but I stop at step 5 because I did not have the necessary equipment.I put everything back in place but now I have no sign of the battery. The charger does not light up when I connect it, I can not see the battery level and my mac still does not work.

What do you think?