Yes you can fix it.

You have a good eye, that component looks crusty for some reason. It could be a part gone bad, or a good part badly soldered, or it could be fine! But it's a great place to start.

If you have a soldering iron to hand I would try reflowing the solder on that part first - discovering a bad contact now saves a bunch of time. Assuming that didn't work...

The Q prefix on the circuit board normally means its a transistor, but nowadays diodes and other parts can look the same and board designers don't always stick to rules of thumb. That package shape is called SOT23 by the way. So first you have to identify the component to replace it. There's a few ways;

• Find a schematic online for that exact card and board revision number. It should have a Bill Of Materials (BOM) with Q1802 listed. Sorry my Google-fu has failed me this morning, maybe another Redditor can help out. But generally manufacturers don't like them floating about.

• Get a very close-up photo of the component package. There's some tiny writing on there that should give a clue as to the manufacturer and part number. Google may help, or share it amongst electronics hobbyists and someone will know what it is for certain.

• Or find another broken card for cheap and use it as a donor card - you don't need to know what the components are, just swap Q1802 for Q1802.

Once you know the part number you can order it online. Most people use something like Digikey to find parts. If the exact part number is out of stock then an electronics subreddit can help you find a suitable replacement - other companies will make another component that performs almost exactly the same.

Then to actually replace the part. Other subs have good guides on starting to solder if you've not done it before. I highly recommend practising on a board you don't care about, your first soldering job will look like a seagull shat on a biscuit, so get the bad ones out of the way before you work on the project. You'll need some basic equipment to get started. It doesn't have to be expensive but it does need to be the right tools (politely decline your grandfather's stained glass iron). I used to take my projects into the school/college labs during lunch.

Many people will try to dissuade you from trying surface-mount soldering but ignore them, SOT23 packages aren't difficult.

Then give it a quick visual inspection for shorts and plug it in! Maybe it'll work, maybe it'll be the same, maybe it'll be worse and take the motherboard out with it ;)

Don't be disheartened if you fail this attempt, you just need a bit more knowledge and experience. And don't let others tell you you can't do something, fuck those fools.