how to ascertain whether a laptop power supply is faulty or failing

by:CTECHi     2019-12-28
Obviously, your power supply is faulty, but this is often not the case.
This article will help you decide whether it is defective or failed.
You may notice any of the following symptoms that may result from a laptop power failure or failure :-1.
If the power supply has an indicator light that does not light up when connected to the power supply, then the power supply (
Or main fuse)must be faulty.
In this case, the power supply should not be connected to the laptop as some motherboard failures cause the power indicator to flash or go off. 2.
If the power supply becomes very hot when it is in use, then it may fail or the rating of the laptop is wrong.
It\'s easy to confuse similar units between laptops.
Check that the rated voltage (I . e. volts and amps) on the laptop matches the rated voltage of the charger.
The charger should show the same voltage as the laptop, however, the current should be the same or higher as the charger.
Sometimes, when the charger becomes very hot, it may turn off and turn on again when it cools down.
However, this is not a safe option and should be replaced immediately. 3.
Sometimes the laptop charger generates an error voltage that is too high or too low.
In general, this can be tested with a cheap multimeter, however, real readings can only be made at full load when connected to a laptop.
But as a guide, the charger may fail if the voltage is too high or too low for more than half a Volt.
If the voltage is too low, then you may find that the battery is not fully charged or is only charged when the laptop is turned off, however, A faulty battery or charging circuit may have the same symptoms.
The laptop may work properly if the voltage is too high, but it may be hotter than usual, or the battery may overheat and the fault speed will be faster than expected. 4.
Everything seems to be running fine, the laptop is running fine, the battery is charging fine, then the battery may stop charging, or the laptop may turn off, which is no doubt.
This is usually caused by a power plug failure connected to the laptop from the charger.
Sometimes the cable breaks where the plug is connected.
This can happen if it has been bent sharply or repeatedly at this point.
Typically, twisting the end of the cable causes the battery to charge and then not charge.
Although this failure is usually caused by an internal laptop socket failure, be careful. 5.
The laptop and charger seem to work fine, but there may be high and potentially dangerous voltage on the plug connected to the laptop.
Use a Multimeter set to AC voltage measurement between a connection (
Which is okay)
Plug connected to the laptop (
Not power plug)
The ground point, which may be any metal object connected to the ground.
There should be only very small or no voltage.
If you see the voltage, then the insulation inside the charger may fail or fail, and it may eventually get the power voltage into the laptop!
For the sake of safety, you should replace the laptop charger immediately.
The laptop charger is relatively cheap and should be replaced immediately if you suspect a fault, as if being ignored could cause an expensive laptop malfunction.
If you use the manufacturer\'s original equipment, the tip should exactly match the socket inside the laptop and usually be smaller than the universal charge.
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