Let’s say your laptop does not start at all. You plug in
the power adapter and press on the power button, but the computer will
not react. It’s dead and the power or battery charge LED will not light up.
What could be wrong? Is it bad power jack or the motherboard is dead?
By the way, the power jack (DC-IN jack) is the power socket
on the side or back of your computer where you plug the AC/DC power adapter.
I’ll explain how to perform basic troubleshooting and find out what is wrong.
This is only for experienced people, who know how to disassemble laptops.
First of all, test the AC/DC power adapter with a multimeter.
It’s very likely that there is noting wrong with the laptop and
your problem is related to the power adapter.
If the adapter tests fine and output correct voltage, disassemble the
computer and remove the top cover.
As you see on the first picture, in my example the power adapter
plugs into the DC-IN power jack which is connected to the motherboard via a harness.
In some models the DC-IN power jack is soldered directly to the motherboard.
Plug in the power adapter and measure voltage at the point
where the DC-IN jack or DC harness (like in my case) connected to the motherboard.
If you are reading the same voltage as on the AC adapter,
it means the power jack or harness works properly and the
problem is related to the motherboard.
If there is no voltage, most likely there is a problem with the
jack or hardness and it has to be replaced.
By the way, in some case the problem could be related to
the fuse which is usually located somewhere very close to the power
jack/harness connector. You can test the fuse with a multimeter.
If the fuse is bad, the motherboard will appear to be dead even if
there is nothing wrong with the power jack and AC/DC adapter.
If that’s the case, replacing the bad fuse should fix the problem.
MAGANDANG UMAGA ...:-*
the power adapter and press on the power button, but the computer will
not react. It’s dead and the power or battery charge LED will not light up.
What could be wrong? Is it bad power jack or the motherboard is dead?
By the way, the power jack (DC-IN jack) is the power socket
on the side or back of your computer where you plug the AC/DC power adapter.
I’ll explain how to perform basic troubleshooting and find out what is wrong.
This is only for experienced people, who know how to disassemble laptops.
First of all, test the AC/DC power adapter with a multimeter.
It’s very likely that there is noting wrong with the laptop and
your problem is related to the power adapter.
If the adapter tests fine and output correct voltage, disassemble the
computer and remove the top cover.
As you see on the first picture, in my example the power adapter
plugs into the DC-IN power jack which is connected to the motherboard via a harness.
In some models the DC-IN power jack is soldered directly to the motherboard.
Plug in the power adapter and measure voltage at the point
where the DC-IN jack or DC harness (like in my case) connected to the motherboard.
If you are reading the same voltage as on the AC adapter,
it means the power jack or harness works properly and the
problem is related to the motherboard.
If there is no voltage, most likely there is a problem with the
jack or hardness and it has to be replaced.
By the way, in some case the problem could be related to
the fuse which is usually located somewhere very close to the power
jack/harness connector. You can test the fuse with a multimeter.
If the fuse is bad, the motherboard will appear to be dead even if
there is nothing wrong with the power jack and AC/DC adapter.
If that’s the case, replacing the bad fuse should fix the problem.
MAGANDANG UMAGA ...:-*
