pcie power cable 6 pins and 8 pins to graphics card error message

[Actually_an_alien]

So, this isn't my computer this is my boyfriends. last night he accidentally spilt his drink on his desk only a little of it actually touching his pc but it didn't get into his pc just the front so that was an easy cleanup. 

boyfriend left for work so I go ton his computer to play VR for a bit but before I could even make it to steam both of his monitors shut off and give me the "Please power down and connect the PCIe power cable for this graphics card" now I know a little bit about pcs. so correct me if I'm wrong. I just have no idea what happened plus I hadn't knocked into it to make the cables come undone. I'm just too scared to get in there and try and look at it.

[TheStyne]

The first thing to try is to open up the pc, and simply remove and reinsert(this process is called "re-seating") the cables, just to address what the error message is saying. Be careful when removing the cables, there is a little clip on the top you need to hold while removing them.