Yes, in theory you could sit there replacing part after part, and doing constant solder work to get it to work, however that just seems like it’d be a lot of trouble when some other steps might help fix it.
I would suggest giving it a proper alcohol bath. I’ve done this to 4 laptops that were completely dead, and one Nintendo 3DS and it has been successful in reviving them. I will detail how to do it below, step-by-step.
- Unplug the charger, and battery from your Mac and hold the power button for 30 seconds. This is important as it will discharge any remaining electricity.
- Grab a bucket to catch excess alcohol.
- Place the end of the laptop with the USB port over the bucket.
- Use isopropyl or ethyl alcohol and pour it directly over the USB port and surrounding components. Don’t be afraid of this step. As long as there is no electricity flowing through your Mac, no damage will occur.
- Use a toothbrush to scrub the area gently including inside the USB port.
- Once finished you will need to let it dry for at least 24 hours. You can expedite this process with a dust blower, or canned air, but the point is, there can not be any wet alcohol left when you power on the computer. Alcohol dries faster than water, but you don’t want to chance it.
Once it’s finished drying, try your USB port. This will most likely work as you stated the port was working before, just getting hot. Try not to get water on the screen as it can get trapped between the LCD and the Glass (That will take days to dry.)
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