How do I clean corrosion after water damage?
I have an iPhone 4 that was immersed in water, but apparently worked for an hour or so before any problems were evident. It has spent two days in a bowl of rice, but I decided to open it up to see what's going on. The two water-sensitive stickers on the back of the logic board have turned pink, and there are copper salts deposited on the logic board near the bottom of the LCD connector (the connector outlined in orange at Step 17 here: iPhone 4 Logic Board Replacement).
I'm thinking that I will try to clean up this corrosion before trying to plug it in again, but I'm not sure what sort of tool to use. Are we talking isopropyl alcohol and a Qtip, or is there some other accepted approach?
Matthew Holland, if it is strictly a cleaning the logic board issue, I use isopropyl alcohol with a greater than 70% alcohol concentration, your local pharmacist can get it for you, and scrub the board with a small brush (tooth brushes work well) This will remove most of the corrosion. I do know that some people pre-treat their boards by cleaning it with distilled water and then use the alcohol which will displace the water. Either way make sure that you let the board dry very well after and stay away from any contact cleaner, etc. Hope this helps, I am sure there are 100's more suggestion and ways to do it, but these are my 2cents :-)
The best solution I've found to remove corrosion is boiling water. I take the Main PC Board out of the phone, boil water in a coffee cup in a microwave then place the board in the water. VERY IMPORTANT DO NOT PLACE THE BOARD IN THE MICROWAVE. After a minute or two carefully remove the board and scrub both sides with a tooth brush. When the board is completely dry return it to the phone. I've used this sucessfuly many times with water damaged Ipods, Iphones, & other electronic devices at the repair shop I work for.