Lenovo S10 FRU: 42W8294 Type 4333-AT1 Motherboard Question

[CLC]

I don't do motherboard repair, but I have a question about this one. It wont power up, was after a storm and I'm sure something on the board fried. Under the power button there is round black plastic piece inside a square black plastic piece it says 100pf and it looks kind of melted. Is this some type of fuse that can be replaced? I usually only do swaps but I found this interesting. I'll try to post a pic later.