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Cleaning the logic board
Submerge the logic board in isopropyl alcohol, and allow it to soak long enough to loosen hardened residue, and to displace any remaining water or other liquid. Use a soft brush to remove visible corrosion and residue.
Residue from motherboard left in isopropyl alcohol container.
Clean all flex ends, battery contacts, connectors, chips, and fuses on motherboard with a soft brush.
Repeat cleaning if necessary, or if traces of residue are still visible.
Allow the logic board or other parts to dry completely before reassembly.
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