M14x short circuit, repair question

Hi, not sure if this is on to post here, new member, yadda yadda. I recently got an m14x and really love it. I wanted to see if I could convert it to a desktop, so today I took it apart. The thing is, when I went to put the button circuit into the case of touched the plug of the power supply which I had left plugged in. So if you didn't catch that, the power button circuit was plugged into the motherboard. The laptop was disassembled, so part of the power supply plug was exposed. The plug and the circuit contacted, causing a pop and some plastic smell. Yeah, I'm an idiot. It was an extremely stupid mistake, I'm not going to deny that.
So I'm sure that the power button circuit is dead and I have another one on the way, but I wanted to know if my motherboard might be dead. There's no physical damage that I can see. I can send pictures if needed.

Thanks for your help! Again, I'm new around here, so let me know if I missed anything.

 

@t456 @Khenglish

 

Pictures would help, yes. Not all too clear where it shorted, tbh. If you can find the schematics you'll know where the fuses are and you'd be able to check those.

You can also start the laptop without the power button board itself. The power-on switch is a small trigger-once relay and with the schematics you'll know which pin on the pb connector on the motherboard you have to connect with a ground in order to start it.

 

Oh shoot, I hadn't even considered that of might've been the fuses. That would makes sense as there doesn't seem to be any physical damage. I may have just bought a useless part. Any idea where I can get the specs for said fuses? I've been looking for wiring diagrams but can't seem to find them.

EDIT: Does the m14x have fuses? I've been scouring the internet and I can't find mention of any anywhere.

Second edit: https://www.flickr.com/photos/162686761@N04/?
I took some pictures of the motherboard and button circuit. F you look at the first picture you can see that without the shell the circuit is right over the power receptacle. This is why it shorted out, part of the plug was exposed.

 

The power button circuit arrived and didn't fix the problem. I can only imagine that I've damaged the board or tripped a fuse by have no idea where to look. Is there anything you might have in terms of advice?

 

The board looks ok by visual except the CPU heatsink area. Since there was a pop and smell, you should check carefully the motherboard for some burned signs.

 

The photos do show at least one fuse:

Spoiler: Fuse F3

Measure it with a multimeter set to resistance; if it shows infinite then it's been triggered. Without access to a meter you can also make a temporary bypass by dropping a bit of solder over the top, shorting/nullifying the fuse. That's obviously not something you do when the culprit of the short is unknown or if it's liquid damage that hasn't been properly dealt with, but if you already know what triggered the short in the first place and it's been remedied or a once-off then a blob of solder is perfectly fine. Just remember to order a replacement and use it as-is in the meantime.

There'll be more fuses like that on the board, so you could look for similar ones. The 'F' is the best indicator, but if it's an unlabeled chip then any two-pin, flat smd with a single-letter coding (on the chip) is a good candidate.

Schematics will be a far superior option. Apart from finding all fuses, it's also because you can then check which capacitors and resistors ought to be populated. If one of the small smds has blown then you might not even find the loose component anymore; they can fly right off the pcb or even disintegrate, rather than showing a nice, clean burn mark. And with many solder pads unpopulated by design it's practically impossible to search for such minor damage without those schematics.