The main reason for the beeping soundof the laptop charger is a short circuit in the DC circuit. The solution is checking the short circuit with a multimeter, and then solder it correctly, and make sure that DC "+" and DC "– " do not touch each other.
The adapter may cause a short circuit because it provides too much power. Check the voltage output of the adapter with a voltmeter and compare the reading with the value listed on the adapter. Small fluctuations above or below the listed value are normal, but if the reading changes too much, it indicates that the power cord is faulty and needs to be replaced.
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