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Can I use Circuit Writer to fix a corroded logic board?I have a phone that was corroded by salt water. I cleaned the board up with isopropyl but there are some damaged circuits. On...
How to troubleshoot logic board after water damage and corrosion?I want to isolate the component that is preventing an iPhone 4S from completing it's GO/NO-GO checklist. It appears to enter ...
Answer to: Can I use Circuit Writer to fix a corroded logic board?OK got my answer here: How to troubleshoot logic board after water damage and corrosion? The gold circles are testing spots. And the advice is not to use Circuit Writer.
Answer to: iPhone Will Not Restore (Error 21) And doesn't charge either.It sounds to me like this is a short circuit somewhere on the logic board or at the battery connector. Is there water damage? If yes, check for corrosion. If no, then carefully inspect the pathways from the battery connector through the logic board. I don't have a whole lot of experience with iPhone repairs, but a short would certainly cause the battery to discharge quickly like that.