Hello,
I am having an issue with my AN515-51-55WL and currently I am unable to boot into windows and it says that there is no bootable device even though the m.2 drive is still inside of it. The issue started a few days ago when the pc just kept crashing even while doing nothing on it and I assumed it was from a windows update because every time it would boot back up, it would try to download the 1809 update and crash at around 89%. After a bit of crashing and rebooting, it just stopped booting and said there was no bootable device. I tried troubleshooting the issue before eventually giving up and opening the back to make sure the m.2 drive wasn't disconnected or damaged in some way. After I took the back off, I immediately noticed some sort of fluid all over the mother board as well as the m.2 drive. I touched the liquid and it seemed oily but it did not have a smell so I am unsure what it is. I then noticed that it seems to be coming from the heat sink's heat pipes right next to the drive as well as all over the radiator section near the fans. I am kind of assuming it got too hot and it cracked the heat pipe causing the liquid to leak out but I am not sure. I have not been doing anything that crazy to make it get that hot and I even have a extra cooling pad underneath because I heard that this pc ran on the hot side.
I even looked this issue up online and haven't seen anything like this except maybe one other person which had a desktop instead of laptop.
Sorry If the attached picture of the issue is large.