Which chemical can I clean my old motherboard with, whose electronics components chips pins like ICs capacitor transistors diodes have dust stocked their color has been changed to black yellowish reddish?
I had cleaned the motherboard with isopropyl and dried it. Some major parts of PCB dust were removed but some dust stuck on pins did not get removed.
After cleaning I gave to the technician for repairing as after cleaning drying the boards were getting power CPU SMPS fans were moving but not giving displays and give fluctuating errors on debug card so technician told me to clean pins also.
Attaching images for showing the pins hope you can find what it's technically termed or called, maybe corrosion of pins.
Saw in YouTube video to clean with detergent and tap water but for years I have heard from people that electronic parts, especially mobile laptops, should not come or wet in contact with water.
Will water and detergent powder and drying in the sun (as I don't have a hot gun or hair dryer to dry it) be safe to electronic PCB, as moisture has stuck the dust to circuit previously also will washing with water detergent work?
Have googled and funded about contact cleaners will it be OK for cleaning pins if IC chips transistors
As some boards are expensive I don't want to throw or scrap them kindly tell me how to get rid of dust moisture.
Waiting for technicians experts advice for cleaning pins dust moisture.
I request moderators and users not to flag or declare question duplicate elaborate or out of the topic or out of focus as it is within topic electric circuits PCB related and I tried to be specific brief with appropriate details of problems I need to some expert advice from experts and technicians engineers professionals and users.