Laptop Not Charging? 19V 3.42A Charger Issue

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A 19V 3.42A laptop charger is not charging a laptop despite showing proper voltage and continuity in the cable. Other chargers work without issue, suggesting the problem lies with the specific charger. Some laptops have a communication feature that prevents charging with unauthorized chargers, even if they provide the correct voltage. This safety mechanism ensures compatibility and protects the device. Understanding this communication process can clarify why the charger fails to power the laptop.
selseg
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I have a 19V 3.42A laptop charger, I cannot charge my laptop with it .I hae checked for continuity and its clear the cable is not broken and the charging voltage is 19V but somehow it doesn't charge my laptop.But other chargers work fine.Whats this miracle in Science I can't understand.
 
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Does it power your laptop ?
Some laptops can communicate with the power supply to check the type and rating and won't charge the battery with an unauthorised charger.
 

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