Laptop does not start, but shows the power led for one second and then dies

infoclogged

Prominent
Mar 18, 2017
2
0
520
1
The power led lights up when i press the power button, but dies afterwards. When I disassemble the laptop, then the laptop boots up. Only after the complete assembly, it wont start - just lights the power led for a second and does nothing. No beep sound, no caps lock light, nothing.

I am using just the plus and minus ( no earth cable ), because I am using a variable power supply. Even after grounding the laptop with an external cable, the problem persists.

Can anyone tell me what steps I should do to check this?

What is the signifgance of earth wires with respect to a notebook, because they are mobile devices and hence when running on battery, has anyways no way to earth itself?

 

infoclogged

Prominent
Mar 18, 2017
2
0
520
1
The problem was a loosened aluminium foil from the top of one of the screws. On tightening the screws, the aluminium foil was acting as a conductor between the motherboard and the lower case and hence leading to a short circuit. After placing the foil back on the screw properly, the computer boots up properly.

Guess, the internal power supply recognises a short circuit and hence blocks the input current. This is why, there was a short power on led for half a second and then dies.
 

infoclogged

Prominent
Mar 18, 2017
2
0
520
1
The problem was a loosened aluminium foil from the top of one of the screws. On tightening the screws, the aluminium foil was acting as a conductor between the motherboard and the lower case and hence leading to a short circuit. After placing the foil back on the screw properly, the computer boots up properly.

Guess, the internal power supply recognises a short circuit and hence blocks the input current. This is why, there was a short power on led for half a second and then dies.
 
Thread starter Similar threads Forum Replies Date
N Laptop Tech Support 15
Rishabh103 Laptop Tech Support 1
C Laptop Tech Support 1
D Laptop Tech Support 10
J Laptop Tech Support 2
A Laptop Tech Support 1
B Laptop Tech Support 1
N Laptop Tech Support 4
R Laptop Tech Support 1
S Laptop Tech Support 2
Z Laptop Tech Support 3
R Laptop Tech Support 1
B Laptop Tech Support 1
S Laptop Tech Support 1
A Laptop Tech Support 1
S Laptop Tech Support 2
R Laptop Tech Support 1
M Laptop Tech Support 1
C Laptop Tech Support 2
H Laptop Tech Support 1
Similar threads
Question Laptop Built in battery plugged in suddenly reboots and it takes long to start again...battery showing 99% before it reboots
Question Laptop has black static, some times it starts, other times it shows black static (kind of)
Question Windows 10 not starting up shows black screen on my connex laptop slim book 2. Only power light is on
Solved! My lenovo y520 15ikbn shows black screen when i start my laptop
Laptop not starting only showing shutting down
my Lenovo g450 laptop is starting up but screen is not showing
Lenovo laptop starts then shows Lenovo and then shuts down
my laptop doesnt show any wifi networks this started when i wanted to manage my storage i deleted aome things and updates my w
In my laptop, yesterday , I was using wifi suddenely it started to show limited access ,so i disabled the wifi network and the
laptop does not work but it starts but the screen doesn't show up
my dell laptop shows memory write and only start if we press enter ..can you solve it please..???
MY lenovo laptop starts and show blank screen after welcome only mouse work
My lenovo G500 touch laptop is starting up but screen is not showing. When i plugged it into another monitor to see of my scre
laptop got hanged and it was starting but it was not showing the dispaly.then what is the problem
My laptop starts but not start up windows just showing Lenovo screen
when I start my laptop then show no bootable device in acer e5 575?.
my lenovo g500s laptop is shut down & when turn on it shows only lenovos logo & don't start windows
password hintlock is showing unvalid what i can do to start my laptop haier y11b
Laptop went dead during factory reset now it comes on shows me the start screen and goes off again
My laptop Dell Vostro 1450 which is 4.5 Years old is not starting when I start it just shows one light and the turns off autom

ASK THE COMMUNITY