Why is there a blinking question mark folder appears
Hello.
After I turned my macpro on, it appears a blinking question mark folder.
It seems like there's sound came out from the hard drive. Eg" kit-crack kit crack"
It happens after I spill my water and it flows into my macbook pro through the touch pad. It was alright (nothing has damaged) after I turned it on after 4 days. But the next day after I turned it on, it became this.
May I know where and what's the problem and how can I fix this?