About 1.5 months ago, a very small amount of sea water accidentally splashed onto the camera. It stopped responding immediately. I removed the battery, lens, and memory card and kept it to dry. After 2 days, it turned on, but several functions are now not working properly.
Issues:
1. In Manual (M) mode:
Buttons don’t respond properly.
Viewfinder display switch doesn’t work.
Autofocus won’t click the shutter.
Most settings are locked or show 'function not selectable.'
2. In other modes:
Works partially, but still sometimes buttons don’t respond.
Viewfinder toggle works.
> I think it may be due to internal corrosion. Please check:
Shutter button function
AF sensor and button circuit
Mode dial and internal PCB contacts
> If cleaning or part replacement is possible and cost-effective, I want to repair it. If the motherboard or main circuit is badly corroded, I need advice whether it’s worth it.”