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How-To 12 April 2026 9 min read

Signs of Water Damage on a MacBook: How to Check Before It Gets Worse

Complete guide to spotting water damage on a MacBook. 10+ physical signs, LCI locations by model, second-hand buying checklist, and when silent corrosion strikes.

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"@type": "Question",

"name": "Can I check the Liquid Contact Indicators myself without opening my MacBook?",

"acceptedAnswer": {

"@type": "Answer",

"text": "On 2013-2015 Retina models, some LCIs are visible through bottom case vents. On 2016+ models, bottom case removal is required. Professional assessment from R599 recommended."

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{

"@type": "Question",

"name": "My MacBook was splashed weeks ago but seems fine β€” should I get it checked?",

"acceptedAnswer": {

"@type": "Answer",

"text": "Yes. Silent corrosion progresses for months then causes catastrophic failure. A from R599 assessment identifies hidden corrosion before it spreads."

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{

"@type": "Question",

"name": "Can liquid damage be repaired if found months later?",

"acceptedAnswer": {

"@type": "Answer",

"text": "Yes, but costs increase significantly. Prompt treatment costs R1,800-R2,400. Delayed cases often require component-level repair at R4,500-R12,000."

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},

{

"@type": "Question",

"name": "Does AppleCare+ cover MacBook liquid damage?",

"acceptedAnswer": {

"@type": "Answer",

"text": "AppleCare+ covers accidental damage with approximately R1,299 excess, but Apple replaces the entire logic board. Independent component-level repair is often more cost-effective."

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},

{

"@type": "Question",

"name": "How can I tell if a second-hand MacBook has water damage?",

"acceptedAnswer": {

"@type": "Answer",

"text": "Use the 10-point checklist: smell keyboard, inspect ports, check screws, test keys, test USB-C ports, check battery, test speakers, verify Wi-Fi/Bluetooth, run Apple Diagnostics."

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},

{

"@type": "Question",

"name": "Can humidity alone trigger Liquid Contact Indicators?",

"acceptedAnswer": {

"@type": "Answer",

"text": "In extreme conditions, Johannesburg summer humidity can cause borderline triggering. Combined with physical signs, it reliably indicates liquid exposure."

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{

"@type": "Question",

"name": "What is the most common sign of hidden water damage on a MacBook?",

"acceptedAnswer": {

"@type": "Answer",

"text": "Intermittent charging issues. The USB-C charging IC corrodes first because it sits near the port where liquid enters."

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{

"@type": "Question",

"name": "How much does it cost to diagnose MacBook water damage?",

"acceptedAnswer": {

"@type": "Answer",

"text": "Comprehensive assessment from R599 includes disassembly, LCI check, stereo microscope examination, component-level diagnosis, and detailed written quote."

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Courtney Bentley, Apple Certified Expert Consultant at ZA Support

Written by

Courtney Bentley

Apple Certified Expert Consultant

Former Apple South Africa Manager (2007-2009). Founded ZA Support at age 19 in 2009. Forbes Africa 30 Under 30 (2019). Has personally overseen more than 25,000 Mac repairs at ZA Support's Hyde Park workshop. Specialises in component-level logic board repair, liquid damage recovery, and medical practice IT. BSc Informatics (UNISA). Member of the Apple Developer Program.

View all articles by Courtney β†’

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