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Old 01-20-2019, 08:53 AM   #1
frank123
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Exclamation Dell Latitude E5450 Power Short Circuit

Hello to everyone

I have a problem with my Dell Latitude E5450.
When I insert the dell power jack into the laptop, the led on the jack turns immediately off, I tried with a different charger that does not have the self-ciruit test like the dell original adapter, and the laptop does not turn on, and no lights on the laptop.
I disassembled the motherboard from the laptop, and I don't know if this would be helpful but, I noticed that when i plug off the charger ( the non original one) from the motherboard, the CPU fan moves a little bit, but a little little bit.
I would be really grateful if you helped me, thank you so much

P.S. I enclose here the schematics of this laptop, the motherboard revision on this pdf is 0.3, on my motherboard is 1.0
Attached Files
File Type: pdf vinafix.vn_ZAM70 LA-A901P r03 Dell Latitude E5450.pdf (1.88 MB, 9 views)

Last edited by frank123; 01-20-2019 at 08:54 AM..
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Old 01-20-2019, 11:08 AM   #2
stj
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Default Re: Dell Latitude E5450 Power Short Circuit

try without the cpu.
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Old 01-20-2019, 11:45 AM   #3
frank123
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Default Re: Dell Latitude E5450 Power Short Circuit

Quote:
Originally Posted by stj View Post
try without the cpu.
The CPU is soldered
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Old 01-20-2019, 02:24 PM   #4
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Default Re: Dell Latitude E5450 Power Short Circuit

damn.
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Old 01-20-2019, 04:04 PM   #5
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Default Re: Dell Latitude E5450 Power Short Circuit

it could be the power jack.while you got the motherboard out plug the power supply in and check to see if you have your voltage.
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Old 01-21-2019, 09:56 AM   #6
ktmmotocross
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Default Re: Dell Latitude E5450 Power Short Circuit

"When I insert the dell power jack into the laptop, the led on the jack turns immediately off"

so it work on battery?

check all big grey coils for short to ground
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Old 01-21-2019, 03:58 PM   #7
frank123
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Default Re: Dell Latitude E5450 Power Short Circuit

Quote:
Originally Posted by ktmmotocross View Post
"When I insert the dell power jack into the laptop, the led on the jack turns immediately off"

so it work on battery?

check all big grey coils for short to ground
Grey coils are in good condition, the battery is low , so I am not able to test, but the laptop seems dead, I noticed with the other charger( that does not have the self-test circuit), the motherboard starts to heat up in around the area where the electric current enters
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Old 01-21-2019, 04:38 PM   #8
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Default Re: Dell Latitude E5450 Power Short Circuit

"Grey coils are in good condition"

i dont ask about it's condition
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Old 01-22-2019, 07:58 AM   #9
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Default Re: Dell Latitude E5450 Power Short Circuit

Hi.

Check that the first Mosfet's and Diodes near the power supply jack are not short-circuited.
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