I would review this Apple T/N to make sure the MagSafe adapter and its cord is in good shape: [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters]. Using a cotton swab (Q-Tip) slightly damp with 85% isopropyl alcohol wipe down the contacts.
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I would review this Apple T/N to make sure the MagSafe adapter and its cord is in good shape: [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters]. Using a cotton swab (Q-Tip) slightly damp with 85% isopropyl alcohol wipe down the contacts if needed.
I would review this Apple T/N to make sure the MAgSafe adapter and its cord is in good shape: [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters]. Using a cotton swab (Q-Tip) slightly damp with 85% isopropyl alcohol wipe down the contacts.
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I would review this Apple T/N to make sure the MagSafe adapter and its cord is in good shape: [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters]. Using a cotton swab (Q-Tip) slightly damp with 85% isopropyl alcohol wipe down the contacts.
I would review this Apple T/N to make sure the MAgSafe adapter and its cord is in good shape: [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters]. Using a cotton swab (Q-Tip) slightly damp with 85% isopropyl alcohol wipe down the contacts.