Domain: technology (Hardware Troubleshooting and Maintenance)
Problem: My electric guitar bridge pickup has been cutting out frequently recently; it only works occasionally at full volume, and I have to flick the 3-way selector switch back and forth rapidly several times just to get it to barely kick back in. This is the original factory soldering, and while I know the overall workmanship is shoddy, I want to identify the root cause of the failure. Please carefully examine the close-up photo of the switch I uploaded, and based on my description, tell me exactly what specific steps I need to take to permanently fix this issue.
Answer: The middle pin requires more solder. The solder needs to be melted to ensure good contact.